Synonyms and other taxonomic changes
=Bathyplectes tristis, Biolysia tristis
Host: the clover leaf weevil, Hypera zoilus
Like its host, the clover leaf weevil, this species is a European immigrant. Although it is generally thelytokous (i.e. females only), I have seen males from NJ, PA, MD, and VA. Males are perhaps even rarer in Europe because in a 1974 revision of the western Palearctic species now placed in Bathyplectes, Horstmann did not mention having seen any.
Horstmann, K. 1974. Revision der westpaläarktischen Arten der Schlupfwespen-Gattungen Bathyplectes und Biolysia (Hymenoptera: Ichneumonidae). Entomologica Germanica 1:58-81.