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Mites of the subfamily Harpirhynchinae (Acariformes: Cheyletoidea: Harpirhynchidae) associated with neognathous birds (Aves: Neognathae) in the New World are revised. In all, 68 species in 8 genera are recorded. Among them, 27 new species and 1 new genus are described as new for science: Harpyrhynchoides gallowayi Bochkov, OConnor and Klompen sp. nov. from Columba livia (Columbiformes: Columbidae) from Canada (Manitoba), H. zenaida Bochkov, OConnor and Klompen sp. nov. from Zenaida macroura (Columbiformes: Columbidae) from USA (Michigan), H. calidris Bochkov, OConnor and Klompen sp. nov. from Calidris minutilla (Charadriiformes: Scolopacidae) from USA (Kansas), H. actitis Bochkov, OConnor and Klompen sp. nov. from Actitis macularius (Charadriiformes: Scolopacidae) from Canada (British Columbia), H. charadrius Bochkov, OConnor and Klompen sp. nov. from Charadrius vociferus (Charadriiformes: Charadriidae) from USA (Texas), H. pluvialis Bochkov, OConnor and Klompen sp. nov. from Pluvialis dominica (Charadriiformes: Charadriidae) from USA (Ohio), H. bubulcus Bochkov, OConnor and Klompen sp. nov. from Bubulcus ibis (Pelecaniformes: Ardeidae) from USA (Florida), H. ixobrychus Bochkov, OConnor and Klompen sp. nov. from Ixobrychus exilis (Pelecaniformes: Ardeidae) from USA (Michigan), H. puffinus Mertins sp. nov. from Puffinus gravis (Procellariformes: Procellariidae) from USA (Florida), H. megascops Bochkov, OConnor and Klompen sp. nov. from Megascops asio (Strigiformes: Strigidae) from USA (Michigan), H. athene Bochkov, OConnor and Klompen sp. nov. from Athene canicularia (Strigiformes: Strigidae) from USA (Texas), H. coccyzus Bochkov, OConnor and Klompen sp. nov. from Coccyzus americanus (Cuculiformes: Cuculidae) from USA (Michigan), H. crotophaga Bochkov, OConnor and Klompen sp. nov. from Crotophaga ani (Cuculiformes: Cuculidae) from Suriname; Crassacarus Bochkov, OConnor and Klompen, gen. nov.: Crassacarus alexfaini Bochkov, OConnor and Klompen sp. nov. (type of genus) from Cardinalis cardinalis (type host) from USA (Michigan), Passerina ciris (unknown locality in North America) (Passeriformes: Cardinalidae), and Setophaga petechia (Passeriformes: Parulidae) from USA (Michigan), C. tinae Bochkov, OConnor and Klompen sp. nov. from Carduelis tristis (Passeriformes: Fringillidae) from USA (Wyoming), C. fritschi Bochkov, OConnor and Klompen sp. nov. from Bombycilla cedrorum (Passeriformes: Bombycillidae) from USA (Michigan), C. sialia Bochkov, OConnor and Klompen sp. nov. from Sialia currucoides (Passeriformes: Turdidae) from USA (Wyoming), C. melanerpes Bochkov, OConnor and Klompen sp. nov. from Melanerpes formicivorus (Piciformes: Picidae) from USA (Kansas); Neharpyrhynchus turdus Bochkov, OConnor and Klompen sp. nov. from Turdus migratorius (Passeriformes: Turdidae) from USA (Michigan), N. campylorhynchus Bochkov, OConnor and Klompen sp. nov. from Campylorhynchus brunneicapillus (Passeriformes: Troglodytidae) from USA (unknown locality), N. spizella Bochkov, OConnor and Klompen sp. nov. from Spizella passerina (Passeriformes: Emberizidae) from USA (various localities), N. quiscalus Bochkov, OConnor and Klompen sp. nov. from Quiscalus quiscula (Passeriformes: Icteridae) from USA (Michigan), N. agelaius Bochkov, OConnor and Klompen sp. nov. from Agelaius phoeniceus (Passeriformes: Icteridae) from USA (Michigan), N. bombycilla Bochkov, OConnor and Klompen sp. nov. Bombycilla cedrorum (Passeriformes: Bombycillidae) from USA (Michigan), N. vireo Bochkov, OConnor and Klompen sp. nov. from Vireo olivaceus (Passeriformes: Vireonidae) from USA (Florida), N. picidarum Bochkov, OConnor and Klompen sp. nov. from Colaptes auratus (type host), Melanerpes formicivorus, Melanerpes uropygidialis, and Picoides pubescens (Piciformes: Picidae) from USA (various localities); Perharpyrhynchus charadrius Bochkov, OConnor and Klompen sp. nov. from Charadrius vociferus (Charadriiformes: Charadriidae) from USA (Michigan). Harpyrhynchoides oenae lamorali (Fain, 1972) syn. nov. is synonymized with Harpyrhynchoides oenae (Fain, 1972). Harpirhynchoides agapornis (Fain, 1972) comb. nov. and Crassacarus cylindripalpus (Fritsch, 1954) comb. nov. are transferred from the subgenus Pseudoharpirhynchus Fain, Bochkov and Mironov, 1999 (type species Harpirhynchus agapornis Fain, 1972) of the genus Harpirhynchus Megnin 1877. The subgenus Pseudoharpirhynchus syn. nov. is synonymized with the genus Harpyrhynchoides. Diagnoses for the subfamily and all genera recorded in the New Word (Anharpyrhynchus Fain, 1972, Crassacarus gen. nov., Harpirhynchus, Harpyrhynchoides Fain, 1972, Fainharpirhynchus Bochkov and Galloway, 2013, Neharpyrhynchus Fain, 1972, Perharpyrhynchus Fain, 1972, Trichorhynchiella Fain, 1995) are provided. Keys to all harpirhynchine genera and all their species occurring in the New World are also given. A list of all harpirhynchine species and their hosts is compiled.

The zumpti species group of the genus Harpyrhynchoides (Harpirhynchidae), parasites of passerines, is revised. A key to the species of this group is provided and data on host associations and geographic distribution of its constituent species are summarized. This group includes six previously recognized species: Harpyrhynchoides alaudinus Bochkov, 2000, H. brevis (Ewing, 1911) comb. nov., H. heatherae Bochkov and Galloway, 2013, H. rubeculinus (Cherny and Sixl, 1971), H. vulgaris Bochkov and Galloway, 2004, and H. zumpti (Fain, 1972). Three species from North American passerines are described as new: H. setophaga sp. nov. from Setophaga ruticilla (Parulidae), H. xanthocephalus sp. nov. from Xanthocephalus xanthocephalus (Icteridae), and H. spizella sp. nov. from Spizella passerina (Emberizidae). Additionally, H. brevis is redescribed based on samples from Coccothraustes vespertinus (type host) and Loxia curvirostra (Passeriformes: Fringillidae) from North America. Harpyrhynchoides kirgizorum Fain et al. 1999 syn. nov. is synonymized with H. zumpti.

Seven new species of intracutaneous parasites of the subfamily Harpirhynchinae Dubinin (Acariformes: Cheyletoidea: Harpirhynchidae) are described: Anharpyrhynchus elizae sp. nov. from Cyanocitta cristata (type host), Cyanocitta stelleri (Passeriformes: Corvidae), and Colaptes auratus (Piciformes: Picidae) from the USA; Anharpyrhynchus apodus sp. nov. from Lichmera indistincta (type host) and Phylidonyris novaehollandiae (Passeriformes: Meliphagidae) from Australia; Anharpyrhynchus lukoschusi sp. nov. from Manorina flavigula (type host) and Certhionyx pectoralis (Passeriformes: Meliphagidae) from Australia; Fainharpirhynchus legatus sp. nov. from Legatus leucophaius (Passeriformes: Tyrannidae) from Trinidad and Tobago; Fainharpirhynchus mossi sp. nov. from Myiarchus crinitus (Passeriformes: Tyrannidae) from an unknown locality in North America; Perharpyrhynchus caprimulgus sp. nov. from Caprimulgus fossii (Caprimulgidae: Caprimulgiformes) from Mozambique; Perharpyrhynchus elseyornis sp. nov. from Elseyornis melanops (Charadriiformes: Charadriidae) from Australia. Keys to females of the genera Anharpyrhynchus, Fainharpirhynchus, and Perharpyrhynchus are provided and data on hosts and distributions of all known intracutaneous harpirhynchines are summarized. In addition, a new non-subcutaneous harpirhynchine is described: Trichorhynchiella myiarchus sp. nov. from feather bases of Myiarchus crinitus (Passeriformes: Tyrannidae) from an unknown locality in North America.

The subfamily Harpypalpinae Fain, 1972 (Acariformes: Cheyletoidea: Harpirhynchidae) is revised. Diagnoses of the subfamily and its two constituent genera, Harpypalpus Dubinin, 1957 and Harpypalpoides Lombert and Moss, 1979, and keys to females of all known species are provided. Data on harpypalpine hosts and distribution are summarized, and nine new species are described: Harpypalpus lonchura sp. nov. from Lonchura castaneothorax (Gould) (Estrildidae) in Australia, Harpypalpus pyrrhula sp. nov. from Pyrrhula pyrrhula (Linnaeus) (Fringillidae) in the Netherlands, Harpypalpus sturnus sp. nov. from Sturnus vulgaris Linnaeus (Sturnidae) in the Netherlands, Harpypalpus taeniopygia sp. nov. from Taeniopygia guttata (Vieillot) (Estrildidae) in Australia, Harpypalpoides hirundinoides sp. nov. from Hirundo rustica Linnaeus (Hirundinidae) in the Netherlands, Harpypalpoides johnstoni sp. nov. from Fringilla coelebs Linnaeus (Fringillidae) (type host) in the Netherlands and Fringilla montifringilla Linnaeus in Kazakhstan, Harpypalpoides regulus sp. nov. from Regulus regulus (Linnaeus) (Regulidae) in the Netherlands, Harpypalpoides sitta sp. nov. from Sitta pygmaea Vigors (Sittidae) in the USA (Arizona, California), and Harpypalpoides sylvia sp. nov. from Sylvia atricapilla (Linnaeus) (Sylviidae) in the Netherlands.

The subfamily Onychalginae Fain, 1988 (Acariformes: Pyroglyphidae) is a monophyletic lineage comprising the closest parasitic relatives of the free-living pyroglyphid house dust mites. Onychalgine mites parasitize passerine birds of the families Estrildidae, Passeridae, and Ploceidae in Africa and South America (a single record of Onychalges spinitarsis from a piciform bird requires confirmation). We revise this subfamily based on external morphology of adults and immature stages using light and scanning electron microscopy and give a key to species. Onychalginae includes 2 genera: Onychalges Gaud and Mouchet, 1959 (6 species) and Paramealia Gaud, 1968 (1 species). The genus Kivuicola Fain, 1971 syn. nov. is synonymized with Onychalges, and its single species K. kivuana Fain, 1971 syn. nov. is considered as a putative synonym of O. odonturus Gaud, 1968. Onychalges spinitarsis (Fain and Gaud, 1984) is considered as a species inquirenda.

Five new species and one new genus of the subfamily Harpirhynchinae (Acariformes: Harpirhynchidae) are described from birds in Canada: Harpyrhynchoides heatherae sp. nov. from Junco hyemalis (Passeriformes: Emberizidae), H. botaurus sp. nov. from Botaurus lentiginosus (Pelecaniformes: Ardeidae), H. phalaropus sp. nov. from Phalaropus lobatus (Charadriiformes: Scolopacidae), Neharpyrhynchus loxia sp. nov. from Loxia curvirostra (Passeriformes: Fringillidae), and Fainharpirhynchus contopus gen. nov., sp. nov. from Contopus cooperi (Passeriformes: Tyrannidae). Additionally, 3 species were recorded in Canada (Manitoba) for the first time: Harpyrhynchoides tracheatus (Fritsch, 1954) from Buteo jamaicensis (Accipitriformes: Accipitridae) (new host), H. modestus (Fain, 1976) from Columba livia (Columbiformes: Columbidae) (new host), and Neharpyrhynchus pilirostris (Berlese et Trouessart, 1889) from Passer domesticus (Passeriformes: Passeridae).

Four new syringophilid species of Syringophiloidus Kethley, 1970 are described from North American passerines: S. zonotrichia n. sp. from Zonotrichia albicolis (Gmelin) (Emberizidae) on Texas; S. jackowiaki n. sp. from Poecile carolinensis (Auduborn) (Paridae) in Texas; and S. xanthocephalus n. sp. from Xanthocephalus xanthocephalus (Bonaparte) (Icteridae) and S. agelaius n. sp. from Agelaius phoeniceus Linnaeus (Icteridae), both from Arizona. Spizella breweri (Cassin) (Emberizidae) from California is a new host for Syringophiloidus sialius Skoracki, Flannery & Spicer, 2009; and Melospiza lincolnii (Auduborn) (Emberizidae) from Texas and Vermivora ruficapilla (Wilson) (Parulidae) from California are new hosts for S. seiuri (Ckark, 1964). S. daberti Bochkov, Fain & Skoracki, 2004 from Passerina ciris Linnaeus (Cardinalidae) is recorded in the USA for the first time. A table with the host associations and distribution of all of the North American species of Syringophiloidus is given.

A new species of syringophilid mites, Mironovia lagopus sp. nov. (Acari: Syringophilidae) is described from feather quills of the rock ptarigman Lagopus muta (Montin) (Phasianidae) from Iceland. Females of this new species differ from the closely related Mironovia rouloul Skoracki and Sikora by setae d2, which are subequal or 1.1-1.2 times shorter than setae e2 (vs. d2 1.4-1.5 times longer than e2 in Mironovia rouloul) and by setae ag1, which are 1.3-1.5 times shorter than ag2 (vs. ag1 1.7-1.8 times shorter than ag2). The postembryonic stages of this new species are figured and described in details. In ontogeny of Mironovia spp., the observed pattern of setal appearance is not different from the pattern in other galliform-associated genera such as Syringophilus and Colinophilus, with exception for tarsal setae p'I, II which are absent in protonymphs. The key to all four species of the genus Mironovia is also provided.