Genus Ephialtes Gravenhorst, 1829

Ephialtes Gravenhorst 1829: 748 .

Type species: Ichneumon manifestator Linnaeus, 1758 .

References. Townes & Townes 1960: 100 [ Pimpla; revision of 4 species (2 described as new) from America north of Mexico]. Townes 1969: 76 [ Pimpla; description; distribution]. Carlson 1979: 326 [ Pimpla; catalogue; 4 species in America north of Mexico]. Ruíz-Cancino et al. 2002: 645 [checklist; 1 species in Mexico]. Horstmann 2008: 153 [revision of 4 European species; key; record of E. manifestator (L.) from Nearctic region].

Ephialtes is a small predominantly Holarctic genus with nine species (taxonomic status of several West Palaearctic species is uncertain). Five species occur in the Nearctic region, of them two species are Holarctic (i.e. also occur in the Palaeaerctic region). One species is known from northern Mexico.

Parasitoids of wasps nesting in the wood ( Hymenoptera: Aculeata) and xylophagous insects.