Plonski I.S.1, Ivlev K.S.2, Tshernyshev S.E.3 2025. First record of an Anthocomus Erichson, 1840 larva (Coleoptera: Malachiidae) found inside a Megachile sp. nest (Hymenoptera: Megachilidae) built in a Heracleum sosnowskyi Mandenova, 1944 stem (Apiaceae) from the Kurskaya Oblast, Russia // Euroasian Entomological Journal. Vol.24. No.2: 113–118 [in English].
1 International Research Institute for Entomology, Natural History Museum Vienna, Burgring 7, A-1010 Wien, Austria. E-mail: isidor.plonski@nhm.at https://orcid.org/0000-0003-3818-1137
2 Voronezh State University, Universitetskaya Pl. 1, Voronezh 394006 Russia. E-mail: kostyaivlev03@mail.ru
3 Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, Frunze Str. 11, Novosibirsk 630091 Russia; Tomsk State University, Prosp. Lenina 36, Tomsk 634050 Russia. E-mail: sch-sch@mail.ru http://orcid.org/0000-0001-5931-9241
doi 10.15298/euroasentj.24.02.11
ABSTRACT. The nests of the solitary leafcutter bee Megachile sp., built in the stem cavities of Sosnowsky’s hogweed (Heracleum sosnowskyi Manden.) growing in Kurskaya Oblast, Russia, were examined in August 2023. A larva of Anthocomus Erichson 1840, closely related to the species Anthocomus rufus (Herbst, 1783), was found among parasitoids of two families of Chalcidoidea in one of the nests. The presence of a Malachiidae larva in the nest of a solitary bee nesting in Apiaceae stems is reported for the first time.
KEY WORDS: soft-winged flower beetle, larva, solitary leafcutter bee nest, hogweed stem, Eastern Europe.