First record of the parasitoid Idris fl avicornis(Hymenoptera: Scelionidae) from eggs of the wolf spider Pardosa agrestis(Araneae: Lycosidae)

Abstract

Th e egg-parasitoid wasp species Idris fl avicornis Förster, 1856 has been recorded from several countries of Europe. It parasitizes eggs of lycosid spiders, mainly those belonging to the genus Pardosa. Th e fi rst published record of Idris fl avicornis is reported from Hungary. Wasps emerged from cocoons of Pardosa agrestis (Westring, 1861), collected during both the early and late generation adult peaks of the spider species. Pardosa agrestis represents a new host species previously unknown for Idris fl avicornis, parasitizing both adult generations throughout the yearly phenology, with comparable prevalence. In both adult generations a prominent female bias was observed in the sex ratio of the emerging wasps. With 2 fi gures.