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The type specimen of Lopesiodinia alvarengai Prado is lost. It is being redescribed and illustrated based on specimens from the type locality (Jacareacanga, Par, Brazil) and the neotype is here designated with the purpose of clarifying the taxonomic status and objectively securing stability of nomenclature.

A catalog of the Chamaemyiidae of Chile is provided. We present all valid names and synonyms for the 14 species and eight genera and subgenera distributed in the country, including information about name, author, year of publication, page number, type-species, type depository, type locality and references. The chamaemyiid fauna of Chile is small, with the largest genus, Ortalidina Blanchard having only five species. Species of the subgenus Xenoleucopis Malloch of the genus Leucopis Meigen (even if referred to only as sp.) are the most cited due to their apparent potential as biological control agents, or the many works recording their biology. The geographical distribution of the different species was compiled from bibliographic data and revised collections.

A new species of the New World genus Trivialia Malloch from Peru is described and illustrated, along with discussion of unusual head morphology in Lauxaniidae. This new species represents an odd case where only a single known species in an otherwise non-dimorphic genus displays extreme sexual dimorphism.

A new genus of Chamaemyiidae (Diptera: Lauxanioidea) is described, namely Leucotaraxis gen. nov. (type species Leucopis atrifacies Aldrich; other included species Leucotaraxis argenticollis (Zetterstedt), comb. nov., Leucotaraxis piniperda (Malloch), comb. nov., and Leucotaraxis sepiola sp. nov.). These species are predators of Adelgidae (Hemiptera) infesting Pinaceae. Leucotaraxis argenticollis is Holarctic, while the other three species are Nearctic. The phylogeny of Leucotaraxis with other representatives of Chamaemyiidae was elucidated using mitochondrial and nuclear DNA sequences and the genus was found to be monophyletic. Egg and puparial stages are discussed or described and illustrated for all species except Leucotaraxis sepiola. A key is provided to all species of Chamaemyiidae known to attack Pinaceae-infesting Sternorrhyncha, an annotated list of these taxa is provided, and a habitus photograph is provided for each genus with such species. In addition, a lectotype is designated for Leucopis olivacea Meijere, and it is synonymized under Neoleucopis obscura (Haliday), syn. nov.

The Neotropical genus Lopesiodinia Prado is represented by two species, L. diversa Prado (Brazil: Rio de Janeiro) and L. alvarengai Prado (Brazil: Par). The genus is reviewed here, and three new species are described and illustrated: Lopesiodinia marcusi sp. nov. (Brazil: Amazonas, Maranho), L. argentata sp. nov. (Brazil: Amazonas) and L. pontarolloi sp. nov. (Brazil: Amazonas, Maranho). A key to identify the subfamilies and extant genera and the species of Traginopinae from the Neotropical Region is presented.

Two new species of Neotraginops Prado (Neotraginops fachini sp. nov. and Neotraginops arikemi sp. nov.) are added to the known Neotropical diversity of the Traginopinae (Odiniidae), and the range is expanded for Neotraginops mexicanus Herndez-Ortiz Dzul-Cauich. A key to the species of the genus is provided. Along with descriptions, photographs and detailed illustrations of the male terminalia are included for the new species.

Themarictera rinhai sp. n. is described from Madagascar. Previously Themarictera was a monotypic genus with only the species, T. flaveolata (Fabricius, 1805) having several synonyms, from continental Africa. A key for identification of both species is provided.

We present a summary and analysis of the Diptera-related information published in Zootaxa from 2001 to 2020, with a focus on taxonomic papers. Altogether, 2,527 papers on Diptera were published, including 2,032 taxonomic papers and 1,931 papers containing new nomenclatural acts, equivalent to 22% of all publications with new nomenclatural acts for Diptera. The new nomenclatural acts include 7,431 new species, 277 new genera, 2,003 new synonymies, and 1,617 new combinations. A breakdown by family of new taxa and new replacement names proposed in the journal during the last two decades is provided, together with a comparison of Zootaxa's output to that of all other taxonomic publications on Diptera. Our results show that the journal has contributed to 20% of all biodiversity discovery in this megadiverse insect order over the last 20 years, and to about 31% in the last decade.

A fully annotated catalog of genus- and species-group names of Neotropical Lauxaniidae (Diptera: Lauxanioidea) is presented, providing details of references to these names in literature, and providing additional details such as distributions, generic combinations, synonymies, misspellings and emendations, information on types, notes on unusual situations, etc. As this catalog is meant to supplement the older Catalog of the Diptera of America North of Mexico, to complete the cataloging of the New World Lauxaniidae, "Neotropical" is herein inclusive of everything south of the United States, and the Nearctic parts of Mexico are not separately distinguished. The catalog is organized alphabetically within each of the three lauxaniid subfamilies, Eurychoromyiinae, Homoneurinae and Lauxaniinae, treating 91 available genus-group names, of which 77 represent valid genera. In the species-group, the catalog treats 441 available species-group names, of which 391 represent valid Neotropical lauxaniid species, 39 are invalid, three are valid but extralimital lauxaniids, five are valid but removed from Lauxaniidae, and two are new replacement names for two homonyms outside Lauxaniidae. The following nine new genera are described, based on previously described species: Elipolambda Gaimari Silva (type species, Sapromyza lopesi Shewell, 1989), Griphoneuromima Silva Gaimari (type species, Sapromyza frontalis Macquart, 1844b), Meraina Silva Gaimari (type species, Lauxania ferdinandi Frey, 1919), Myzaprosa Gaimari Silva (type species, Myzaprosa mallochi Gaimari Silva), Paradeceia Silva Gaimari (type species, Sapromyza sororia Williston, 1896b), Pseudodeceia Silva Gaimari (type species, Lauxania leptoptera Frey, 1919), Sericominettia Gaimari Silva (type species, Minettia argentiventris Malloch, 1928), Zamyprosa Gaimari Silva (type species, Sapromyza semiatra Malloch, 1933), and Zargopsinettia Gaimari Silva (type species, Minettia verticalis Malloch, 1928). The following four new replacement names in the species-group replace junior homonyms: Myzaprosa mallochi Gaimari Silva (for Sapromyza spinigera Malloch, 1933, nec Malloch, 1925), Pseudogriphoneura mallochi Silva Gaimari (for Minettia infuscata Malloch, 1928, nec Sciomyza infuscata Wulp, 1897), Xenochaetina hendeli Silva Gaimari (for Allogriphoneura robusta Hendel, 1936, nec Helomyza robusta Walker, 1858), Zamyprosa macquarti Gaimari Silva (for Sciomyza nigripes Blanchard, 1854, nec Sapromyza nigripes Macquart, 1844). The following six genus-group names are new synonyms: Allogriphoneura Hendel, 1925 (= Xenochaetina Malloch, 1923), Bacilloflagellomera Papp Silva, 1995 (= Stenolauxania Malloch, 1926), Haakonia Curran, 1942 (= Xenochaetina Malloch, 1923), Homoeominettia Broadhead, 1989 (= Allominettia Hendel, 1925), Paraphysoclypeus Papp Silva, 1995 (= Physoclypeus Hendel, 1907), Tibiominettia Hendel, 1936 (= Allominettia Hendel, 1925). The following 12 species-group names are new synonyms: Chaetocoelia banksi Curran, 1942 (= Chaetocoelia excepta (Walker, 1853)), Chaetocoelia tripunctata Malloch, 1926 (= Chaetocoelia excepta (Walker, 1853)), Minettia semifulva Malloch, 1933 (= Zamyprosa nigriventris (Blanchard, 1854)), Pseudogriphoneura scutellata Curran, 1934a (= Xenochaetina porcaria (Fabricius, 1805)), Sapromyza apta Walker, 1861 (= Chaetominettia mactans (Fabricius, 1787)), Sapromyza brasiliensis Walker, 1853 (= Chaetominettia corollae (Fabricius, 1805)), Sapromyza semiatra subsp. remissa Malloch, 1933 (= Zamyprosa semiatra (Malloch, 1933)), Sapromyza sordida Williston, 1896b (= Neogriphoneura sordida (Wiedemann, 1830)), Setulina geminata subsp. quadripunctata Malloch, 1941, subsp. tripunctata Malloch, 1941 subsp. verticalis Malloch, 1941 (= Setulina geminata (Fabricius, 1805)), Tibiominettia setitibia Hendel, 1932 (= Allominettia assimilis (Malloch, 1926)). The following 96 lauxaniid species-group names are in new combinations: Allominettia approximata (Malloch, 1928; Deutominettia Hendel, 1925), Allominettia assimilis (Malloch, 1926; Minettia Robineau-Desvoidy, 1830), Allominettia rubescens (Macquart, 1844b; Sapromyza Fallén, 1810), Allominettia woldae (Broadhead, 1989; Homoeominettia Broadhead, 1989), Camptoprosopella sigma (Hendel, 1910; Procrita Hendel, 1908), Camptoprosopella verena (Becker, 1919; Sapromyza Fallén, 1810), Dryosapromyza pirioni (Malloch, 1933; Minettia Robineau-Desvoidy, 1830), Elipolambda duodecimvittata (Frey, 1919; Lauxania Latreille, 1804), Elipolambda lopesi (Shewell, 1989; Sapromyza Fallén, 1810), Elipolambda picrula (Williston, 1897; Sapromyza Fallén, 1810), Griphoneuromima frontalis (Macquart, 1844b; Sapromyza Fallén, 1810), Homoneura maculipennis (Loew, 1847; Sapromyza Fallén, 1810), Lauxanostegana albispina (Albuquerque, 1959; Steganopsis Meijere 1910), Marmarodeceia claripennis (Curran, 1934a; Pseudogriphoneura Hendel, 1907), Melanomyza nigerrima (Becker, 1919; Sapromyza Fallén, 1810), Meraina ferdinandi (Frey, 1919; Lauxania Latreille, 1804), Minettia altera (Curran, 1942; Pseudogriphoneura Hendel, 1907), Minettia duplicata (Lynch Arribálzaga, 1893; Sapromyza Fallén, 1810), Minettia lateritia (Rondani, 1863; Sapromyza Fallén, 1810), Minettia lupulinoides (Williston, 1897; Sapromyza Fallén, 1810), Minettia pallens (Blanchard, 1854; Sapromyza Fallén, 1810), Minettia remota (Thomson, 1869; Sapromyza Fallén, 1810), Minettia setosa (Thomson, 1869; Sapromyza Fallén, 1810), Myzaprosa chiloensis (Malloch, 1933; Sapromyza Fallén, 1810), Myzaprosa emmesa (Malloch, 1933; Sapromyza Fallén, 1810), Myzaprosa triloba (Malloch, 1933; Sapromyza Fallén, 1810), Neodecia albovittata (Loew, 1862; Lauxania Latreille, 1804), Neodecia bivittata (Curran, 1928b; Pseudogriphoneura Hendel, 1907), Neodecia flavipennis (Curran, 1928b; Pseudogriphoneura Hendel, 1907), Neodecia vittifacies (Curran, 1931; Pseudogriphoneura Hendel, 1907), Neominettia eronis (Curran, 1934a; Sapromyza Fallén, 1810), Neominettia lebasii (Macquart, 1844b; Sapromyza Fallén, 1810), Neominettia melanaspis (Wiedemann, 1830; Sciomyza Fallén, 1820d), Neoxangelina congruens (Hendel, 1910; Physegenua Macquart, 1848a/b), Neoxangelina facialis (Wiedemann, 1830; Sciomyza Fallén, 1820d), Neoxangelina flavipes (Hendel, 1926; Physegenua Macquart, 1848a/b), Paracestrotus albipes (Fabricius, 1805; Scatophaga Fabricius, 1805), Paradeceia incidens (Curran, 1934a; Sapromyza Fallén, 1810), Paradeceia shannoni (Malloch, 1933; Sapromyza Fallén, 1810), Paradeceia sororia (Williston, 1896b; Sapromyza Fallén, 1810), Physegenua annulata (Macquart, 1844b; Ephydra Fallén, 1810), Physoclypeus nigropleura (Papp Silva, 1995; Paraphysoclypeus Papp Silva, 1995), Poecilohetaerus suavis (Loew, 1847; Sapromyza Fallén, 1810), Poecilolycia blanchardi (Malloch, 1933; Sapromyza Fallén, 1810), Poecilolycia lineatocollis (Blanchard, 1854; Sapromyza Fallén, 1810), Poecilominettia aibonito (Curran, 1926; Minettia Robineau-Desvoidy, 1830), Poecilominettia bipunctata (Say, 1829; Sapromyza Fallén, 1810), Poecilominettia evittata (Malloch, 1926; Minettia Robineau-Desvoidy, 1830), Poecilominettia mona (Curran, 1926; Minettia Robineau-Desvoidy, 1830), Poecilominettia nigropunctata (Malloch, 1928; Minettia Robineau-Desvoidy, 1830), Poecilominettia plantaris (Thomson, 1869; Sapromyza Fallén, 1810), Poecilominettia quichuana (Brèthes, 1922; Sapromyza Fallén, 1810), Poecilominettia schwarzi (Malloch, 1928; Sapromyza Fallén, 1810), Poecilominettia sonax (Giglio-Tos, 1893; Sapromyza Fallén, 1810), Poecilominettia thomsonii (Lynch-Arribálzaga, 1893; Sapromyza Fallén, 1810), Poecilominettia triseriata (Coquillett, 1904a; Sapromyza Fallén, 1810), Pseudocalliope albomarginata (Malloch, 1933; Minettia Robineau-Desvoidy, 1830), Pseudodeceia leptoptera (Frey, 1919; Lauxania Latreille, 1804), Pseudogriphoneura albipes (Wiedemann, 1830; Lauxania Latreille, 1804), Pseudominettia argyrostoma (Wiedemann, 1830; Lauxania Latreille, 1804), Ritaemyia unifasciata (Macquart, 1835; Tephritis Latreille, 1804), Sciosapromyza fuscinervis (Malloch, 1926; Minettia Robineau-Desvoidy, 1830), Sciosapromyza limbinerva (Rondani, 1848; Sapromyza Fallén, 1810), Sciosapromyza scropharia (Fabricius, 1805; Scatophaga Fabricius, 1805), Scutominettia guyanensis (Macquart, 1844b; Sapromyza Fallén, 1810), Sericominettia argentiventris (Malloch, 1928; Minettia Robineau-Desvoidy, 1830), Sericominettia aries (Curran, 1942; Pseudogriphoneura Hendel, 1907), Sericominettia holosericea (Fabricius, 1805; Scatophaga Fabricius, 1805), Sericominettia nigra (Curran, 1934a; Pseudogriphoneura Hendel, 1907), Sericominettia velutina (Walker, 1853; Helomyza Fallén, 1820a), Stenolauxania flava (Silva, 1999a; Bacilloflagellomera Papp Silva, 1995), Stenolauxania fusca (Silva, 1999a; Bacilloflagellomera Papp Silva, 1995), Stenolauxania longicornus (Silva, 1999a; Bacilloflagellomera Papp Silva, 1995), Stenolauxania nigrifemuris (Silva, 1999a; Bacilloflagellomera Papp Silva, 1995), Stenolauxania pectinicornis (Papp Silva, 1995; Bacilloflagellomera Papp Silva, 1995), Trivialia nigrifrontata (Becker, 1919; Sapromyza Fallén, 1810), Trivialia scutellaris (Williston, 1896b; Phortica Schiner, 1862), Trivialia venusta (Williston, 1896b; Sapromyza Fallén, 1810), Xenochaetina annuliventris (Hendel, 1926; Allogriphoneura Hendel, 1925), Xenochaetina glabella (Becker, 1895; Lauxania Latreille, 1804), Xenochaetina nigra (Williston, 1896b; Physegenua Macquart, 1848a/b), Xenochaetina phacosoma (Hendel, 1926; Allogriphoneura Hendel, 1925), Xenochaetina porcaria (Fabricius, 1805; Scatophaga Fabricius, 1805), Xenochaetina robusta (Walker, 1858; Helomyza Fallén, 1820a), Zamyprosa dichroa (Malloch, 1933; Minettia Robineau-Desvoidy, 1830), Zamyprosa edwardsi (Malloch, 1933; Sapromyza Fallén, 1810), Zamyprosa ferruginea (Macquart, 1844b; Opomyza Fallén, 1820b), Zamyprosa fulvescens (Blanchard, 1854; Sciomyza Fallén, 1820d), Zamyprosa fulvicornis (Malloch, 1933; Sapromyza Fallén, 1810), Zamyprosa micropyga (Malloch, 1933; Sapromyza Fallén, 1810), Zamyprosa nigripes (Macquart, 1844b; Sapromyza Fallén, 1810), Zamyprosa nigriventris (Blanchard, 1854; Sapromyza Fallén, 1810), Zamyprosa parvula (Blanchard, 1854; Sapromyza Fallén, 1810), Zamyprosa semiatra (Malloch, 1933; Sapromyza Fallén, 1810), Zamyprosa seminigra (Malloch, 1933; Minettia Robineau-Desvoidy, 1830), Zargopsinettia verticalis (Malloch, 1928; Minettia Robineau-Desvoidy, 1830). The following 42 species have lectotype designations herein: Allogriphoneura nigromaculata Hendel, 1925 (synonym of Xenochaetina porcaria (Fabricius, 1805)), Allogriphoneura robusta Hendel, 1936 (= Xenochaetina hendeli Silva Gaimari), Allominettia maculifrons Hendel, 1925 (synonym of Allominettia xanthiceps (Williston, 1897)), Blepharolauxania trichocera Hendel, 1925, Chaetocoelia palans Giglio-Tos, 1893, Euminettia zuercheri Hendel, 1933b (Minettia Robineau-Desvoidy, 1830), Griphoneura triangulata Hendel, 1926, Lauxania albovittata Loew, 1862 (Neodecia Malloch, in Malloch McAtee, 1924), Lauxania imbuta Wiedemann, 1830 (Griphoneura Schiner, 1868), Lauxania lutea Wiedemann, 1830 (Neominettia Hendel, 1925), Lauxania ruficornis Macquart, 1851a (synonym of Xenochaetina flavipennis (Fabricius, 1805)), Neominettia fumosa Hendel, 1926 (synonym of Neominettia costalis (Fabricius, 1805)), Physegenua ferruginea Schiner, 1868, Physegenua vittata Macquart, 1848a/b, Pseudogriphoneura cormoptera Hendel, 1907, Sapromyza angustipennis Williston, 1896b (Chaetocoelia Giglio-Tos, 1893), Sapromyza distinctissima Schiner, 1868 (Chaetocoelia Giglio-Tos, 1893), Sapromyza exul Williston, 1896b (Neodecia Malloch, in Malloch McAtee, 1924), Sapromyza gigas Schiner, 1868 (Dryosapromyza Hendel, 1933a), Sapromyza ingrata Williston, 1896b (Poecilominettia Hendel, 1932), Sapromyza latelimbata Macquart, 1855a (synonym of Chaetominettia corollae (Fabricius, 1805)), Sapromyza lineatocollis Blanchard, 1854 (Poecilolycia Shewell, 1986), Sapromyza longipennis Blanchard, 1854 (= Minettia duplicata (Lynch Arribálzaga, 1893)), Sapromyza nigerrima Becker, 1919 (Melanomyza Malloch, 1923), Sapromyza nigriventris Blanchard, 1854 (Zamyprosa Gaimari Silva), Sapromyza octovittata Williston, 1896b (Poecilominettia Hendel, 1932), Sapromyza ornata Schiner, 1868 (Neoxangelina Hendel, 1933a), Sapromyza pallens Blanchard, 1854 (Minettia Robineau-Desvoidy, 1830), Sapromyza parvula Blanchard, 1854 (Zamyprosa Gaimari Silva), Sapromyza picrula Williston, 1897 (Elipolambda), Sapromyza puella Williston, 1896b (Trivialia Malloch, 1923), Sapromyza sororia Williston, 1896b (Paradeceia Silva Gaimari), Sapromyza venusta Williston, 1896b (Trivialia Malloch, 1923), Sapromyza xanthiceps Williston, 1897 (Allominettia Hendel, 1925), Scatophaga scropharia Fabricius, 1805 (Sciosapromyza Hendel, 1933a), Sciomyza fulvescens Blanchard, 1854 (Zamyprosa Gaimari Silva), Sciomyza melanaspis Wiedemann, 1830 (Neominettia Hendel, 1925), Sciomyza nigripes Blanchard, 1854 (= Zamyprosa macquarti Gaimari Silva), Sciomyza obscuripennis Bigot, 1857 (Physegenua Macquart, 1848a/b), Scutolauxania piloscutellaris Hendel, 1925, Trigonometopus albifrons Knab, 1914, Trigonometopus rotundicornis Williston, 1896b. The following three species are removed from being recognized as part of the Neotropical fauna: Homoneura americana (Wiedemann, 1830; Sapromyza Fallén, 1810), Homoneura maculipennis (Loew, 1847; Sapromyza Fallén, 1810), Poecilohetaerus suavis (Loew, 1847; Sapromyza Fallén, 1810). The following four species are removed from the family, three of which are put into the following new combinations: Senopterina cyanea (Fabricius, 1805; Lauxania Latreille, 1804) (Platystomatidae), Dihoplopyga delicatula (Blanchard, 1854; Sapromyza Fallén, 1810) (Heleomyzidae), Pherbellia geniculata (Macquart, 1844b; Sapromyza Fallén, 1810) (Sciomyzidae). The remaining species, Sapromyza fuscipes Macquart, 1844b, is of uncertain family placement within the Muscoidea. The following new replacement names for species of Platystomatidae were necessary due to homonymy: Senopterina gigliotosi Gaimari Silva (for Bricinniella cyanea Giglio-Tos, 1893, nec Lauxania cyanea Fabricius, 1805), and Rivellia macquarti Gaimari Silva (for Tephritis unifasciata Macquart, 1843: 381, nec Macquart, 1835: 465).

Two new genera of Chamaemyiidae (Diptera: Lauxanioidea) are described and illustrated, including: Chamaethrix gen. nov. (type species Chamaethrix necopina sp. nov.), possibly a predator of Cinara ponderosae (Williams) on Pinus ponderosa in the southwestern United States; and Vitaleucopis gen. nov. (type species Vitaleucopis nidolkah sp. nov.; other included species Vitaleucopis astonea (McAlpine), comb. nov., and Vitaleucopis scopulus sp. nov.), predators of Cinara aphids and possibly adelgids on Pinaceae in western North America. Immature stages are discussed or described and illustrated for some taxa, including the eggs of Chamaethrix necopina and Vitaleucopis nidolkah; and the third instars and puparia of Vitaleucopis nidolkah.

Umbodinia bella gen. nov. et sp. nov. is described and illustrated from specimens collected in the canopy of an ombrophilous Amazonian forest, Manaus, Brazil. The genus is characterized by a unique combination of diagnostic features: body predominantly yellow; frons with two shiny dark brown to black lobules in lower corners, between the lunule and eye margins; lunule high-arched with two subtriangular spots covered with black pubescence; parafacial with tufts of long and strong setae, almost as long and stout as the fronto-orbital setae; and anepisternum with setulae dorsally and posteriorly, in addition to posterior setae.

A new genus of odiniids (Odiniidae: Traginopinae) is described from Brazil, Pauximyia gen. nov., with two species, P. oliveirai sp. nov. (type species) and P. vidali sp. nov. A modified key to the Neotropical genera of the family and for the two Pauximyia gen. nov. species is provided.

The silver fly Leucopis glyphinivora Tanasijtshuk (Diptera: Chamaemyiidae) is an aphidophagous predator during its larval stage. Our study describes the life cycle of L. glyphinivora and evaluates its potential as a biocontrol agent. The development, survival and longevity of L. glyphinivora were observed and compared with those of the aphid gall midge Aphidoletes aphidimyza Rondani (Diptera: Cecidomyiidae). Tests were conducted under laboratory conditions in Petri dishes with the green peach aphid Myzus persicae Sulzer (Hemiptera: Aphididae) on potato leaves. Leucopis glyphinivora has a 42% longer life cycle than A. aphidimyza. Larval development was 27% longer in L. glyphinivora than in A. aphidimyza. Egg hatch rate and pupal emergence rate were similar in both species, but larval survival was 20% lower for L. glyphinivora than for A. aphidimyza. Sex ratio was approximately 50% in both species. A longer development time for L. glyphinivora in the larval stage could be an advantage for biocontrol by providing more time to exert predation pressure against aphids. However, this may be offset by the lower survival rate found in the silver fly larvae.

The family Odiniidae is newly reported from Iran through the recent discovery of the species Odinia meijerei Collin, 1952 and Turanodinia graciosa Krivosheina Krivosheina, 1996 in Iran and the Middle East region. The species T. graciosa is here elevated from the rank of subspecies (Turanodinia stackelbergi graciosa Krivosheina Krivosheina, 1996) to species level. This taxonomical change was based on the comparison of the male genitalia of T. graciosa with T. stackelbergi Krivosheina Krivosheina. Images of the habitus and male genitalia of O. meijerei and T. graciosa are provided.

Seventeen species of the genus Sapromyza Fallén occurring in Iran are revised. The following new species are described and illustrated: Sapromyza bernhardi, S. damavandensis and S. sabourii. In addition, S. clathrata Shatalkin, S. kabuli Papp and S. quadripunctata (Linnaeus) are recorded for the first time from Iran. Distribution of species in Iran is reviewed, and a key to the species is provided.

Study of all flies (Diptera) collected for one year from a four-hectare (150 x 266 meter) patch of cloud forest at 1,600 meters above sea level at Zurquí de Moravia, San José Province, Costa Rica (hereafter referred to as Zurquí), revealed an astounding 4,332 species. This amounts to more than half the number of named species of flies for all of Central America. Specimens were collected with two Malaise traps running continuously and with a wide array of supplementary collecting methods for three days of each month. All morphospecies from all 73 families recorded were fully curated by technicians before submission to an international team of 59 taxonomic experts for identification.        Overall, a Malaise trap on the forest edge captured 1,988 species or 51% of all collected dipteran taxa (other than of Phoridae, subsampled only from this and one other Malaise trap). A Malaise trap in the forest sampled 906 species. Of other sampling methods, the combination of four other Malaise traps and an intercept trap, aerial/hand collecting, 10 emergence traps, and four CDC light traps added the greatest number of species to our inventory. This complement of sampling methods was an effective combination for retrieving substantial numbers of species of Diptera. Comparison of select sampling methods (considering 3,487 species of non-phorid Diptera) provided further details regarding how many species were sampled by various methods.        Comparison of species numbers from each of two permanent Malaise traps from Zurquí with those of single Malaise traps at each of Tapantí and Las Alturas, 40 and 180 km distant from Zurquí respectively, suggested significant species turnover. Comparison of the greater number of species collected in all traps from Zurquí did not markedly change the degree of similarity between the three sites, although the actual number of species shared did increase.        Comparisons of the total number of named and unnamed species of Diptera from four hectares at Zurquí is equivalent to 51% of all flies named from Central America, greater than all the named fly fauna of Colombia, equivalent to 14% of named Neotropical species and equal to about 2.7% of all named Diptera worldwide. Clearly the number of species of Diptera in tropical regions has been severely underestimated and the actual number may surpass the number of species of Coleoptera.        Various published extrapolations from limited data to estimate total numbers of species of larger taxonomic categories (e.g., Hexapoda, Arthropoda, Eukaryota, etc.) are highly questionable, and certainly will remain uncertain until we have more exhaustive surveys of all and diverse taxa (like Diptera) from multiple tropical sites.        Morphological characterization of species in inventories provides identifications placed in the context of taxonomy, phylogeny, form, and ecology. DNA barcoding species is a valuable tool to estimate species numbers but used alone fails to provide a broader context for the species identified.

Estimations of tropical insect diversity generally suffer from lack of known groups or faunas against which extrapolations can be made, and have seriously underestimated the diversity of some taxa. Here we report the intensive inventory of a four-hectare tropical cloud forest in Costa Rica for one year, which yielded 4332 species of Diptera, providing the first verifiable basis for diversity of a major group of insects at a single site in the tropics. In total 73 families were present, all of which were studied to the species level, providing potentially complete coverage of all families of the order likely to be present at the site. Even so, extrapolations based on our data indicate that with further sampling, the actual total for the site could be closer to 8000 species. Efforts to completely sample a site, although resource-intensive and time-consuming, are needed to better ground estimations of world biodiversity based on limited sampling., Competing Interests: The authors declare no competing interests.

The family Celyphidae (Diptera, Lauxanioidea) is verified as part of the New World fauna, with a second specimen discovered of a species described from French Guiana in 1844 by P.J.M. Macquart. As this species possesses characteristics that clearly suggest a separate lineage from the Old World celyphids, a new genus is proposed, Atopocelyphus gen. n. , with the type species, Celyphus ruficollis Macquart, in the new combination Atopocelyphus ruficollis (Macquart), comb. n. A key to world genera of Celyphidae is presented, along with discussion of generic concepts. Chamaecelyphus Frey is synonymized under Spaniocelyphus Hendel, syn. n. , resulting in the following 10 new combinations: Spaniocelyphus africanus (Walker), comb. n. ; S. dichrous (Bezzi), comb. n. ; S. gutta (Speiser), comb. n. ; S. halticinus (Frey), comb. n. ; S. kalongensis (Vanschuytbroek), comb. n. ; S. ruwenzoriensis (Vanschuytbroek), comb. n. ; S. straeleni (Vanschuytbroek), comb. n. ; S. upembaensis (Vanschuytbroek), comb. n. ; S. violaceus (Vanschuytbroek), comb. n. ; S. vrydaghi (Vanschuytbroek), comb. n. The subgenera of Celyphus Dalman are elevated to genus rank, as Paracelyphus Bigot, stat. rev. , and Hemiglobus Frey, stat. rev. , resulting in the following 17 new and revised combinations: Hemiglobus cheni (Shi), comb. n. ; H. eos (Frey), comb. n. ; H. lacunosus Frey, comb. rev. ; H. pellucidus Frey, comb. rev. ; H. planitarsalis (Shi), comb. n. ; H. porosus (Tenorio), comb. n. ; H. pulchmaculatus (Liu & Yang), comb. n. ; H. quadrimaculatus (Tenorio), comb. n. ; H. resplendens Frey, comb. rev. ; H. rugosus (Tenorio), comb. n. ; H. testaceus (Malloch), comb. n. ; H. trichoporis (Shi), comb. n. ; H. unicolor Frey, comb. rev. ; H. violaceus Chen, comb. rev. ; Paracelyphus hyacinthus Bigot, comb. rev. ; P. medogis (Shi), comb. n. ; P. vittalis (Shi), comb. n.

Five species of the genus Tetroxyrhina Hendel from China are described as new to science: Tetr. dashahensis sp. nov., Tetr. dentata sp. nov., Tetr. jinpingensis sp. nov., Tetr. menglunensis sp. nov. and Tetr. tengchongensis sp. nov., and the species Tetr. sauteri (Hendel), also from China, is redescribed. The genitalia of these species are illustrated and described. Trigonometopus alboapicalis Shatalkin, is synonymized under Tetr. sauteri, syn. nov. A key to separate all species of the genus is provided, along with nomenclatural details for all species, and photographs of all primary type specimens.

Five species of the subgenus Plesiominettia Shatalkin from the southern China are described as new to science: Minettia (Plesiominettia) flavoscutellata sp. n., Minettia (Plesiominettia) longaciculiformis sp. n., Minettia (Plesiominettia) nigrantennata sp. n., Minettia (Plesiominettia) tridentata sp. n. and Minettia (Plesiominettia) zhejiangica sp. n. One species, Minettia longistylis Sasakawa, is transferred to the subgenus Plesiominettia from Minettia s. str. A key to separate the known species of the subgenus is presented, along with a taxonomic list of species. The type materials of the new species are deposited in the China Agricultural University, Beijing, China (CAUC).

The 27 Californian species of the genus Melanagromyza Hendel (Diptera: Agromyzidae) are reviewed, including descriptions of three new species (Melanagromyza californiana sp. nov., M. chemsaki sp. nov. and M. gonzalesina sp. nov.) and the first record for one species (Melanagromyza martini Spencer) for California and the USA. All species in California are described or redescribed, with illustrations and photographs, and a key to the species is presented. Maps for the species in California, along with host distributions, are provided, with comments on biology and host plants.

Fauna Europaea provides a public web-service with an index of scientific names (including important synonyms) of all extant multicellular European terrestrial and freshwater animals and their geographical distribution at the level of countries and major islands (east of the Urals and excluding the Caucasus region). The Fauna Europaea project comprises about 230,000 taxonomic names, including 130,000 accepted species and 14,000 accepted subspecies, which is much more than the originally projected number of 100,000 species. Fauna Europaea represents a huge effort by more than 400 contributing taxonomic specialists throughout Europe and is a unique (standard) reference suitable for many user communities in science, government, industry, nature conservation and education. The Diptera-Brachycera is one of the 58 Fauna Europaea major taxonomic groups, and data have been compiled by a network of 55 specialists. Within the two-winged insects (Diptera), the Brachycera constitute a monophyletic group, which is generally given rank of suborder. The Brachycera may be classified into the probably paraphyletic 'lower brachyceran grade' and the monophyletic Eremoneura. The latter contains the Empidoidea, the Apystomyioidea with a single Nearctic species, and the Cyclorrhapha, which in turn is divided into the paraphyletic 'aschizan grade' and the monophyletic Schizophora. The latter is traditionally divided into the paraphyletic 'acalyptrate grade' and the monophyletic Calyptratae. Our knowledge of the European fauna of Diptera-Brachycera varies tremendously among families, from the reasonably well known hoverflies (Syrphidae) to the extremely poorly known scuttle flies (Phoridae). There has been a steady growth in our knowledge of European Diptera for the last two centuries, with no apparent slow down, but there is a shift towards a larger fraction of the new species being found among the families of the nematoceran grade (lower Diptera), which due to a larger number of small-sized species may be considered as taxonomically more challenging. Most of Europe is highly industrialised and has a high human population density, and the more fertile habitats are extensively cultivated. This has undoubtedly increased the extinction risk for numerous species of brachyceran flies, yet with the recent re-discovery of Thyreophoracynophila (Panzer), there are no known cases of extinction at a European level. However, few national Red Lists have extensive information on Diptera. For the Diptera-Brachycera, data from 96 families containing 11,751 species are included in this paper.

Liriomyza huidobrensis (Blanchard) is a highly destructive invasive leafminer pest currently causing extensive damage to vegetable and horticultural crops around the world. Liriomyza langei Frick is a leafminer pest native to California that cannot currently be morphologically distinguished from L. huidobrensis. We used a DNA-barcoding approach, a published PCR-RFLP method, and a new multiplex PCR method to analyze 664 flies matching the morphological description of huidobrensis-langei. We found no evidence for the presence of L. huidobrensis in our extensive samples from California. In addition to the new molecular method, this work is important because it provides definitive data that the California "pea leafminer" is currently, and has probably always been, L. langei. These data will also be important in the event that the highly invasive L. huidobrensis ever becomes established., (© 2014 Entomological Society of America.)

The genera and species of New World stiletto flies (Diptera: Therevidae) are listed, with annotated references to nomenclature, synonymies and generic combinations, type localities, the primary type depositories, distribution, and citations for the most recent revisions. The genus Cyclotelus Walker, 1850 (along with its synonyms Furcifera Kröber, 1911, and Epomyia Cole, 1923a) is synonymized under Cerocatus Rondani, 1848. Ectinorhynchus fascipennis Kröber, 1911 is given the new name Cerocatus rondanii Gaimari, and Phycus rufiventris Kröber, 1911 is given the new name Cerocatus raspii Hauser. Phycus analis Kröber, 1911 and Phycus bicolor Kröber, 1911, are placed as new combinations in Cerocatus Rondani, as are the following species that were previously in combination with Cyclotelus: Furcifera achaeta Malloch, 1932, Cyclotelus badicrusus Irwin and Webb, 1992, Phycus beckeri Kröber, 1911, Epomyia bella Cole, 1923a, Furcifera braziliana Cole, 1960a, Cyclotelus colei Irwin and Lyneborg, 1981a, Thereva diversipes Kröber, 1911, Thereva fascipennis Macquart, 1846a, Psilocephala femorata Kröber, 1911, Furcifera flavipes Kröber, 1928b, Furcifera hardyi Cole, 1960a, Furcifera kroeberi Cole, 1960a, Cyclotelus laetus Walker, 1850, Furcifera longicornis Kröber, 1911, Cyclotelus nigroflammus Walker, 1850, Psilocephala nigrifrons Kröber, 1914a, Thereva pictipennis Wiedemann, 1821, Furcifera polita Kröber, 1911, Cyclotelus pruinosus Walker, 1850, Thereva ruficornis Macquart, 1841a, Psilocephala rufiventris Loew, 1869, Thereva scutellaris Walker, 1857, Cyclotelus silacrusus Irwin and Webb, 1992, Cyclotelus socius Walker, 1850 and Psilocephala sumichrasti Bellardi, 1861. Dialineura pallidiventris Malloch, 1932, Melanothereva blackmani Oldroyd, 1968, Thereva maculicornis Jaennicke, 1867 and Thereva notabilis Macquart, 1841a are placed as new combinations in Entesia Oldroyd. Henicomyia amazonica Irwin and Webb, 1992 is a new synonym of Henicomyia flava Lyneborg, 1972. Henicomyia varipes Kröber, 1912a is given revised species status from former synonymy with, Henicomyia hubbardii Coquillett, 1898.

The genus Sciasmomyia Hendel is revised. Eight new species are proposed, including Sciasmonzyia decussata sp. nov. (China), S. leishanensis sp. nov. (China), S. longicurvata sp. nov. (China), S. longissimna sp. nov. (China), S. lui sp. nov. (China), S. quadricuspis sp. nov. (China), S. thaii sp. nov. (Vietnam), and S. tubata sp. nov. (China). The two previously known species, Sciasmomyia meijerei Hendel and S. supraorientalis (Papp), are recorded for the first time as occurring in China, with the latter species also newly recorded for India, Nepal and Thailand. A key to separate the 10 species of this genus is presented, and a lectotype is designated for Sciasmomyia meijerei.

The Neotropical window fly genus Heteromphrale Kröber, 1937 is revised. Two previously described species (Heteromphrale chilensis (Kröber, 1937) and Heteromphrale cyanops (Edwards, 1932)) are redescribed while a new species (Heteromphrale blancasp. n.) is described from Argentina. The male of Heteromphrale chilensis and female of Heteromphrale cyanops are described and figured for the first time, and a key to species is presented.

The ommatidial lens surfaces of the compound eyes in several species of files (Insecta: Diptera) and a related order (Mecoptera) were analyzed using a recently developed Raman-atomic force microscope. We demonstrate in this work that the atomic force microscope (AFM) is a potentially useful instrument for gathering phylogenetic data and that the newly developed Raman-AFM may extend this application by revealing nanometer-scale surface chemistry. This is the first demonstration of apertureless near-field Raman spectroscopy on an intact biological surface. For Chrysopilus testaceipes Bigot (Rhagionidae), this reveals unique cerebral cortex-like surface ridges with periodic variation in height and surface chemistry. Most other Brachyceran flies, and the "Nematoceran" Sylvicola fenestralis (Scopoli) (Anisopodidae), displayed the same morphology, while other taxa displayed various other characteristics, such as a nodule-like (Tipula (Triplicitipula) sp. (Tipulidae)) or coalescing nodule-like (Tabanus punctifer Osten Sacken (Tabanidae)) morphology, a smooth morphology with distinct pits and grooves (Dilophus orbatus (Say) (Bibionidae)), or an entirely smooth surface (Bittacus chlorostigma MacLachlan (Mecoptera: Bittacidae)). The variation in submicrometer structure and surface chemistry provides a new information source of potential phylogenetic importance, suggesting the Raman-atomic force microscope could provide a new tool useful to systematic and evolutionary inquiry.