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This article provides information about the presence in Spain of the genus Philanthinus, de Beaumont, 1949 represented by a species considered conspecific with P. integer de Beaumont, 1949; it is the first record for Spain and western Europe., Este artículo da a conocer la presencia en España del género Philanthinus de Beaumont, 1949, representado por una especie que se ha considerado coespecífica con P. integer de Beaumont, 1949; constituye su primera cita en nuestro país y en Europa occidental.

In this work new records of some species of Sphecidae and Crabronidae in Spain are added . It is noteworthy to highlight the first records for Crossocerus assimilis (F. Smith, 1856), Crossocerus congener (Dahlbom, 1844) and Crossocerus walkeri (Shuckard, 1837) for Spain. The presence in Spain of Gorytes schmiedeknechti Handlirsch,1888 is confirmed., En este trabajo se añaden nuevos datos relativos a algunas especies de Sphecidae y Crabronidae en España. Destacan las primeras citas para nuestro país de Crossocerus assimilis (F. Smith, 1856), de Crossocerus congener (Dahlbom, 1844) y de Crossocerus walkeri (Shuckard, 1837). Se confirma la presencia en España de Gorytes schmiedeknechti Handlirsch,1888.

En este trabajo se añaden nuevos datos a la distribución conocida de algunas especies de Sphecidae y Crabronidae en España. Destaca la primera cita para nuestro País de Ammophila touareg André, 1886 y de Pemphredon maurusia Valkeila, 1972. Se confirma la presencia en España de Nitela fallax Kohl, 1884, de Oxybelus dissectus eburneofasciatus Dahlbom, 1845 y de Isodontia mexicana (Saussure, 1867).

Leucospis dorsigera Fabricius, 1775 (Chalcidoidea, Leucospidae), Ectemnius hypsae (De Stefani, 1894) (Apoidea, Crabronidae) and Colletes perezi Morice, 1904 (Apoidea, Colletidae) are recorded for the first time from the Canary Islands (Spain). Data about trophic ecology are given and possible hypotheses for their recent discovery are discussed., Leucospis dorsigera Fabricius, 1775 (Chalcidoidea, Leucospidae), Ectemnius hypsae (De Stefani, 1894) (Apoidea, Crabronidae) y Colletes perezi Morice, 1904 (Apoidea, Colletidae) son citadas por primera vez para las Islas Canarias (España). Se proporcionan datos sobre ecología trófica y se discuten las posibles hipótesis de su reciente descubrimiento.

Este artículo proporciona nuevos datos sobre la distribución de algunas especies de Apoidea Spheciformes en España. Destaca la primera cita para España de Dryudella aquitana (Pulawski, 1970) y la captura de numerosos ejemplares de Lestica pluschtschevskyi (F. Morawitz, 1891) después de casi cien años. Además, se confirma la presencia en el país de Pseneo exaratus (Eversmann, 1849) y de Ectemnius nigritarsus (Herrich-Schaeffer, 1840).

Door gebruik te maken van observatiekunstnestjes is het mogelijk om regelmatig een kijkje te nemen in de nesten van bijvoorbeeld graafwespen. Zij gebruiken de nesten om zich voort te planten. Zo kunnen we meer te weten komen over hun gedrag in het nest tijdens de voortplanting. In dit artikel worden de ervaringen met de graafwesp Psenulus fuscipennis beschreven. De verschillen in levenswijze met de kleine zeefwesp en bijenwolf worden toegelicht.

Door gebruik te maken van observatiekunstnestjes is het mogelijk om regelmatig een kijkje te nemen in de nesten van bijvoorbeeld graafwespen. Zij gebruiken de nesten om zich voort te planten. Zo kunnen we meer te weten komen over hun gedrag in het nest tijdens de voortplanting. In dit artikel worden de ervaringen met de graafwesp Psenulus fuscipennis beschreven. De verschillen in levenswijze met de kleine zeefwesp en bijenwolf worden toegelicht.

Door gebruik te maken van observatiekunstnestjes is het mogelijk om regelmatig een kijkje te nemen in de nesten van bijvoorbeeld graafwespen. Zij gebruiken de nesten om zich voort te planten. Zo kunnen we meer te weten komen over hun gedrag in het nest tijdens de voortplanting. In dit artikel worden de ervaringen met de graafwesp Psenulus fuscipennis beschreven. De verschillen in levenswijze met de kleine zeefwesp en bijenwolf worden toegelicht.

Differences in reproductive strategies are often hypothesized as the adaptive result of frequency-dependent and condition-dependent selection. However, conventional explanations of mating systems based on ecology do not include the fitness effects of interactions between the sexes. Ecological factors, phenotypic variation, and intersexual interactions must all be examined in order to understand the evolution of reproductive behavior. I investigated the natural history, ecology, and behavior of the sand wasp Steniolia nigripes (Hymenoptera: Crabronidae), using both field observations and controlled behavioral trials. The sand wasps (Bembicinae) are a large, highly diverse group of wasps with extensive variation in male and female reproductive behavior across species. Steniolia nigripes shows reversed sexual size dimorphism and a previously undescribed resource-based territorial strategy in males. The results of this research indicate that the distribution of S. nigripes is determined primarily by the availability of prey used to provision offspring. Seasonal changes and social environment also affect the distribution and behavior of both male and female wasps. A small minority of male wasps hold territories consisting of plants that females visit for prey and nectar. These territorial males are significantly larger and more aggressive than other males, indicating that body size may be important to male competitive success. However, there is no clear evidence of female mating preferences based on either the size or the behavior of males, despite the frequent harassment of females by territorial males in the field. This species thus demonstrates unusual and highly variable morphological and behavioral phenotypes. Studying unique species such as Steniolia nigripes provides a rich opportunity for a comparative understanding of the evolution of body size and reproductive tactics.

Differences in reproductive strategies are often hypothesized as the adaptive result of frequency-dependent and condition-dependent selection. However, conventional explanations of mating systems based on ecology do not include the fitness effects of interactions between the sexes. Ecological factors, phenotypic variation, and intersexual interactions must all be examined in order to understand the evolution of reproductive behavior. I investigated the natural history, ecology, and behavior of the sand wasp Steniolia nigripes (Hymenoptera: Crabronidae), using both field observations and controlled behavioral trials. The sand wasps (Bembicinae) are a large, highly diverse group of wasps with extensive variation in male and female reproductive behavior across species. Steniolia nigripes shows reversed sexual size dimorphism and a previously undescribed resource-based territorial strategy in males. The results of this research indicate that the distribution of S. nigripes is determined primarily by the availability of prey used to provision offspring. Seasonal changes and social environment also affect the distribution and behavior of both male and female wasps. A small minority of male wasps hold territories consisting of plants that females visit for prey and nectar. These territorial males are significantly larger and more aggressive than other males, indicating that body size may be important to male competitive success. However, there is no clear evidence of female mating preferences based on either the size or the behavior of males, despite the frequent harassment of females by territorial males in the field. This species thus demonstrates unusual and highly variable morphological and behavioral phenotypes. Studying unique species such as Steniolia nigripes provides a rich opportunity for a comparative understanding of the evolution of body size and reproductive tactics.

The behavioural ecology of Oxybelus argentatus Curtis and Oxybelus trispinosus Fabricius was investigated in a shared nesting area in Northern Italy. Females of the two species nested in bare, sandy soil and dug unicellular (O. trispinosus) or multicellular (O. argentatus) nests. Digging and provisioning activities were temporally well segregated across the day in O. argentatus, while they widely overlapped in O. trispinosus. O. trispinosus, differently from O. argentatus, never closed its nest nor performed any cleaning of the burrowed material which accumulated into a mound around the nest entrance. Females of O. argentatus hunted almost only the therevid fly Thereva fulva Meigen for its larvae, while O. trispinosus collected many species of Calliphoridae and one species of Sarcophagidae. Females of both species, however, collected only male prey. Many of the aforementioned differences may limit the competition between these two, closely related, small-scale sympatric species. Paralysed flies were taken to the nest impaled on the sting (O. argentatus) or mostly using the mid and forelegs (O. trispinosus). This difference in prey-carrying seems to reflect the different morphology of the sting, with O. argentatus having lancets shorter than the stylet (possibly increasing the efficiency of prey impaling) and O. trispinosus having lancets long as the stylet. After a literature survey of the other 23 species of the genus, a comparative review of nesting and foraging ecology of the genus is also presented

Despite its potential value in phylogenetic and ecological studies, the morphology of antennal sensilla has rarely been compared quantitatively within the Apoidea. Here, through a scanning electron microscopy analysis, we provide an inventory of different types of antennal sensilla and compare their morphology across 10 species of predatory wasps (Crabronidae: Philanthinae) including species that hunt exclusively either on beetles or on bees to feed their larvae. A sensilla-free area was found on the apical flagellomer of all but two species, and its shape and size appear to be useful for separating Philanthini from Cercerini within the subfamily. A total of eight types of sensilla (sensilla placoidea, sensilla basiconica, two types of pit organs, sensilla coelocapitula and three types of sensilla trichoidea) were found in all species, and an additional rarer type (grooved peg sensilla) was found only in three bee-hunting species and for first time in the genus Cerceris. Certain morphological features confirmed the separation of the apoid wasps from the rest of the Apoidea (i.e., bees). A cluster analysis based on the sizes of the different types of sensilla suggested that, overall, sensilla morphology is not a useful taxonomic tool, and thus, other factors likely determine interspecific variability. One candidate factor is the prey type, given some differences in the presence, density, size and distribution of certain types of olfactory sensilla between beetle-hunters and bee-hunters. This hypothesis needs to be further tested quantitatively using a larger species set, more individuals per species, additional sensilla features, and a correction for phylogeny.

Resumen: Trypoxylon (Trypargilum) mexicanum (Hymenoptera: Crabronidae) pertenece al grupo albitarse, el cual incluye a las especies mayores del género. Su distribución nativa abarca América Central, desde México hasta Panamá. En este trabajo se menciona por primera vez para la Hispaniola, Antillas. Es difícil imaginarse una especie conspicua como esta sin haber sido detectada anteriormente por algún naturalista o especialista en himenópteros aculeatos, por lo que considero un arribo reciente a la isla. Esta especie pudo haber llegado a través del comercio con América Central, ya que los nidos, hechos de barro, pueden transportar fácilmente los inmaduros, que emergen posteriormente y se dispersan después de su arribo. T. mexicanum, al menos está establecido en República Dominicana, con distribución amplia y poblaciones grandes. Esto demuestra el éxito ecológico de una población recientemente establecida en la isla, posiblemente debido al la falta de enemigos naturales y otros factores limitantes. Las hembras fueron observadas en charcos de agua, en los caminos, donde recogieron barro para construir los nidos tubulares. Las celdillas de crianza fueron aprovisionadas exclusivamente con varias especies de arañas de la familia Araneidae. La araña endémica, Eustala bisetosa Bryant fue además utilizada como presa. Se proveen otros datos sobre la historia natural. Abstract: Trypoxylon (Trypargilum) mexicanum (Hymenoptera: Crabronidae) belongs to the albitarse group, which includes the larger species of the genus. Its native distribution extends throughout Central America from Mexico to Panama. Here it is reported for the first time from Hispaniola, West Indies. Because it is difficult to envisage such a conspicuous species having eluded capture any naturalist or aculeate specialist previously, I consider that it has recently arrived on the island. It may have arrived due to the trade with Central America, since the nests, made of mud, can easily transport the immatures that

The diggerwasp Passaloecus brevilabris new to the Dutch fauna (Hymenoptera: Crabronidae) In the summer of 2002 a new diggerwasp for the Netherlands was found by the author, north of Herkenbosch (province of Limburg) at the edge of a forest consisting mainly of pine Pinus sylvestris and oak Quercus robur. Females of Passaloecus brevilabris can be recognised by their truncated and fully haired clypeus in combination with a short labrum that lacks the small distal lobe which is present in most related species. The species is known from several European countries, ranging from Scandinavia to France, although only in small numbers.

Pemphredon montana, new to The Netherlands (Hymenoptera: Sphecidae) In 1998 Pemphredon montana Dahlbom, 1845 was recorded for the first time in the Netherlands. The species was found nesting in the insulating material of a caravan in the northernmost part of the province of Overijssel.

Pemphredon montana, new to The Netherlands (Hymenoptera: Sphecidae) In 1998 Pemphredon montana Dahlbom, 1845 was recorded for the first time in the Netherlands. The species was found nesting in the insulating material of a caravan in the northernmost part of the province of Overijssel.

Pemphredon montana, new to The Netherlands (Hymenoptera: Sphecidae) In 1998 Pemphredon montana Dahlbom, 1845 was recorded for the first time in the Netherlands. The species was found nesting in the insulating material of a caravan in the northernmost part of the province of Overijssel.

[EN] Ammoplanus torresi sp. n., is described from Cabeça, Serra da Estrela (Portugal). The male is characterized by the presence of two lateral protuberances on gastral sternum V, and the female by the sculpture of the whole body. Taxonomical and morphological data are provided, together with several notes on the distribution of the Iberian Ammoplanina., [ES] Se describe Ammoplanus torresi sp. n. con material colectado en la localidad portuguesa de Cabeça (Serra da Estrela). El macho se caracteriza por la presencia de dos protuberancias laterales en el esterno V del gáster; la hembra por la escultura del cuerpo. Se aportan datos sobre la taxonomía, distribución y morfología de los Ammoplanina ibéricos.

[EN] The mature larva of Tachysphex albocinctus (LUCAS, 1848) is described; besides some data on the morphology of cocoon and prepupa are reported., [ES] Se describe la larva madura de Tachysphex albocinctus (LUCAS, 1848) y se realizan breves comentarios sobre la morfología del capullo y la prepupa.

[EN] In the present paper a new species of Carinostigmus TSUNEKI, 1954, C. hispanicus sp. n., from Villaviciosa de Odón of Madrid province (Spain) is described. The geographical distribution of this genus, which hitherto was represented in the western Palearctic Region only by C. marocensis (TsuNEKI, 1956) is commented. The genus Carinostigmus is recorded for first time for Europe., [ES] En el presente trabajo se describe una especie nueva de Carinostigmus TSUNEKI, 1954, C. hispanicus sp. n., de la localidad española de Villaviciosa de Odón (Madrid). Comentamos la distribución geográfica del mencionado género, el cual únicamente estaba representado en la Región Paleártica occidental por C. marocensis (TsuNEKr, 1956). Se cita el género Carinostigmus por primera vez para Europa.

[EN] Description of Diodontus bejarensis sp. nov. from Spain., [ES] Entre los géneros de esfécidos paleárticos, es, sin lugar a dudas, Diodontus CURTIS, 1834, uno de los más difíciles de estudiar. Las dificultades surgen debido a que no pocas especies poseen una marcada variabilidad, no sólo geográfica, sino también individual. Resulta, por tanto, que los caracteres definitorios de tipo morfológico no son, en ciertos casos, patentes y constantes a la vez. Como consecuencia de esto las claves existentes para la identificación de las especies no son muy claras, permitiendo identificar de una manera satisfactoria únicamente el material correspondiente a las especies más comunes.

La fauna española de himenópteros —sin duda una de las más ricas de Europa— ofrece aún un dilatado campo de sorpresas en cuanto al hallazgo de nuevos elementos, incluso en aquellas familias que han sido mejor estudiadas y que por el tamaño de sus representantes, facilidad de captura o ciertos especiales atractivos, han sido más repetidamente buscadas por los entomólogos profesionales o aficionados.

Le Catalogue publié par G. Ceballos (1956) a très utilement reuni les résultats acquis dans l'étude et l'exploration de la faune espagnole d'Hyménoptères. Celle-ci mérite une attention particulière en raison de l'imposante liste des espèces recensées et du pourcentage d'espèces endémiques plus élevé que partout ailleurs en Europe. Considérant les données zoogéographiques discutées dans ma Monographie des Crabroniens (1954), il est évident qu'une connaissance plus approfondie des populations de Crabroniens espagnols apporterait des éléments très importants, éclairant sur l'histoire du peuplement de l'Europe glaciaire et postglaciaire. Or, plus de la moitié des provinces espagnoles restent des territoires inconnus, d'oü on n'a pas renseigné la moitié des espéces probables de Crabroniens ; on n'a donc pas encore repéré convenablement les sites à espèces méridionales ou endémiques et ceux qui maintiennent des populations plus septentrionales à. la limite sud de leur expansion.

Les Lindenius paléarctiques ont fait l'objet d'une excellente révision de J. de Beaumont (Mitt. schweiz. ent. Ges., 29, 1956, p. 145). L'espèce décrite ci-après se distingue à l'oeil im paree qu'il s'agit du plus grand et du plus robuste de tous les Lindenius: il mesure 12 mm., et paree que son abdomen est vivement coloré en orangé clair. La conformation du clypétis est aussi caractéristique (fig. 1), les mésopleures et le mésonotum sont très brillants, à ponctuation nette mais très éparse. C'est done une espèce isolée qui a peut-étre des liens de parenté avec luteiventris Morawitz. Je la dédie à M. le Directeur Gonzalo Ceballos, que je remercie d'avoir mis les Crabroniens de l'Instituto Español de Entomología à ma disposition.