Darwin wasps of the subfamily Pimplinae (Hymenoptera: Ichneumonidae) of Mexico: Ephialtes genus-group Author Khalaim, Andrey I. 0000-0003-1802-2649 Facultad de Ingeniería y Ciencias, Universidad Autónoma de Tamaulipas, Cd. Victoria, Tamaulipas, Mexico. & Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia. akhalaim@gmail.com Author Ruíz-Cancino, Enrique 0000-0003-4305-6568 Facultad de Ingeniería y Ciencias, Universidad Autónoma de Tamaulipas, Cd. Victoria, Tamaulipas, Mexico. text Zootaxa 2022 2022-07-29 5169 3 201 251 journal article 10.11646/zootaxa.5169.3.1 2cbc0f84-2011-4e7c-868f-6c305d5f3308 1175-5326 6952172 BB6FBD07-6B8B-4615-BD66-C4AEB612145F Genus Iseropus Förster, 1869 Iseropus Förster 1869: 164 . Type species: Ichneumon graminellae Schrank, 1802 (= stercorator Fabricius, 1793), by subsequent monotypy (Woldestedt 1877: 16). Synonym: Cnemopimpla Cameron, 1903 . References. Townes & Townes 1951: 189 [catalogue; 4 species in America north of Mexico ]. Townes & Townes 1960: 165 [revision of 3 species from America north of Mexico ; key]. Townes & Townes 1966: 14 [catalogue; 2 species in Neotropical region]. Townes 1969: 85 [description; distribution]. Carlson 1979: 331 [catalogue; 3 species in America north of Mexico ]. Gauld 1991: 228 [description; 1 species in Costa Rica (described as new)]. Gauld et al . 1998: 26 [2 species in Costa Rica (1 described as new); key]. Kasparyan 2006 [1 new species from Mexico ]. Iseropus is a small genus with nine species in Holarctic and Neotropical regions. Three species occur in the Nearctic region (one of them also occurs in the Palaearctic region), two species were described from Costa Rica , and two species are restricted to South America. One species is known from Mexico . Species of the genus are gregarious ectoparasitoids in cocoons of various Lepidoptera , especially Lasiocampidae , Lymantriidae and Tortricidae .