Mud dauber wasps (Apoidea: Crabronidae and Sphecidae) of the Nature Reserve “Rivnenskyi” and their biotopes belonging

The article presents a list of species of wasps of the Nature Reserve “Rivnenskyi”, collected on the territory of all four massifs: “Biloozerskyi”, “Somyne”, “Syra Pogonya” and “Perebrody”; six departments: Biloozerske, Karasynske, Bilske, Hrabunske, Starosilske and Pivnichne. Wasps of the families Crabronidae and Sphecidae were caught in the growing seasons 2021–2024 with the help of an entomological net and Merike traps and trap-nests. We analysed 486 specimens of wasps belonging to the families Crabronidae and Sphecidae. These were 81 species from 27 genera: Bembecinus (2), Bembix (1), Cerceris (7), Crabro (2), Dryudella (1), Crossocerus (3), Diodontus (2), Ectemnius (9), Gorytes (4), Harpactus (1), Lestica (2), Lindenius (1), Mimumesa (1), Miscophus (2), Nysson (6), Oxybelus (6), Palarus (1), Passaloecus (4), Pemphredon (4), Philanthus (1), Psenulus (2), Tachysphex (7), Trypoxylon (4), Ammophila (4), Podalonia (1), Sceliphron (2), Sphex (1 species). Of the 81 species which were caught, 78 were recorded for the first time in the reserve. One of the identified species, Sphex funerarius Gussakovskij, 1934, is listed in the Red Data Book of Ukraine as “Not assessed”. Furthermore, Dryudella lineata Mocsáry, 1879 and Passaloecus borealis Dahlbom, 1844 were recorded for the first time in Ukraine. Nests of the wasp Sceliphron curvatum (F.Smith, 1870), an invasive species in Ukraine, were also found. No adults were found. 35 species of wasps were caught directly on angiosperms from ten families: Apiaceae (6 species), Lamiaceae (1), Asteraceae (5), Brassicaceae (1), Rosaceae (2), Ericaceae (1), Campanulaceae (1), Rhamnaceae (1), Caprifoliaceae (1) and Hypericaceae (1). The largest number of wasp species, those were 13, were captured on Thymus serpyllum L., 1753. All the collected material is stored in the Entomological Collection of the Zoological Museum of Ivan Franko National University of Lviv.