L’inventaire des fourmis réalisé dans la Réserve Naturelle Nationale de Néouvielle réactualise l’état des connaissances de la myrmécofaune plus d’un demi-siècle après les derniers inventaires opérés. De nouvelles espèces ont été répertoriées et Leptothorax goesswaldi a été découvert pour la première fois dans les Pyrénées. La singularité microclimatique du Massif de Néouvielle permet aux espèces d’atteindre des altitudes record pour le versant français des Pyrénées centrales.

Gynandromorphy is a case of teratological aberration in which a specimen displays both male and female morphological characters. Gynandromorphs can constitute a powerful source of information for pairing sexes and studying the developmental mechanisms underlying sexually dimorphic traits. In this paper, a second case of gynandromorphy is unveiled in a specimen of Nomada lathburiana found in Tournai (Belgium). The studied specimen, classified as a mosaic gynandromorph, displays a largely asymmetric mix of male and female features only on the head. Further research in entomological collections should reveal other cases of teratological aberrations like the one reported here. Such cases offer valuable insights into the broader understanding of gynandromorphy.

<p>OSMIA 11 - full volume - numéro complet</p>

Spain has a large, species-rich bee fauna, but despite a long history of study, new species continue to be discovered at a rapid rate. New collections made during an expedition have revealed the existence of two additional species: Andrena (Taeniandrena) contracta spec. nov. is described from the high-altitude zone of the Sierra Nevada (Granada), and Nomada halophila spec. nov. is described from saline lagoons in Málaga province, where it is a parasite of the recently described Andrena (Notandrena) juliana Wood, 2021. These findings emphasise the need to investigate unusual or understudied habitats in order to fully document the rich Spanish bee fauna.

The gasteruptiid fauna of the Maltese archipelago is reviewed for the first time. Four species of Gasteruption are found to inhabit the Maltese Islands, and Gasteruption tanyakronum n. sp. van Achterberg is described on the basis of material collected from Malta and Sardinia (Italy).

The gasteruptiid fauna of the Maltese archipelago is reviewed for the first time. Four species of Gasteruption are found to inhabit the Maltese Islands, and Gasteruption tanyakronum n. sp. van Achterberg is described on the basis of material collected from Malta and Sardinia (Italy).

Sommaire / Contents - Tous les articles du volume 4 / numéro 4de la revue OSMIA, revue d'Hyménoptérologie. All issues of the journal OSMIA - volume 4, journal of Hymenopterology. Hymenoptera, hyménoptères, Observatoire des Abeilles OA

'Malaise' (discomfort) in the gardens: thousands bees lost to science? Monograph and typology of bee collections dead in garden greenhouses in Rennes (France). - Greenhouses of allotments and kitchen gardens collect wild Bees at a magnitude which might be seen as a passive sampling method to monitor bees at local or national level.

Contribution to the inventory of Hymenoptera Anthophila of the Lot department: a commented preliminary list. - This article presents a first commented list of solitary bees (Hymenoptera: Anthophila) of the Lot department (46). The list presents 398 species including 111 Apidae, 82 Halictidae, 79 Megachilidae, 92 Andrenidae, 27 Colletidae, 7 Melittidae. After a short presentation of the department, the article continues, for each species, with a presentation of their occurrence and their ecological traits (lectism, sociality, nesting). Through 3 major historical periods the rarity status of each species is added and compared to the IUCN red list of European bees; a rarity index at the departmental scale is also provided. A comparison is made with the French fauna of Anthophila. Finally, a focus on some of the remarkable species of Anthophila of the Lot department is provided.

Discovery of Sphex funerarius Gussakovskij (Hymenoptera, Sphecidae) in Gaume (Belgium).