Pimpla grapholithae Cresson, in Hamilton, 1890:50, ♂♀. 1 ♀, Missouri (Amer. Ent. Soc.); 2 ♂♂ (leg. Dr. Hamilton); Townes & Townes, 1960Townes, H.K. & M. Townes 1960. Ichneumon-flies of America North of Mexico: 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. Bulletin of the United States National Museum 216 (2):1-676.:85, Lectotype ♂ (Philadelphia). - Dalla Torre, 1901-1902Dalla Torre, C.G. 1901-1902. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. — Volumen III: Trigonalidae, Megalyridae, Stephanidae, Ichneumonidae, Agriotypidae, Evaniidae, Pelecinidae. Pars II. Breitkopf & Härtel, Leipzig. VIII + 1141. (distribution). - As Calliephialtes grapholithae: - Townes, 1944Townes, H.K. 1944. A catalogue and reclassification of the Nearctic Ichneumonidae (Hymenoptera) - Part I. The subfamilies Ichneumoninae, Tryphoninae, Cryptinae, Phaeogeninae and Lissonotinae. Memoirs of the American Entomological Society 11 (1-2):1-477. (distribution); Townes & Townes, 1960Townes, H.K. & M. Townes 1960. Ichneumon-flies of America North of Mexico: 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. Bulletin of the United States National Museum 216 (2):1-676. (distribution); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198. (distribution); González et al., 2015González, A., J.M. Coronado, F. Garcia, S.N. Myartseva, V. Ávila, E. Ruiz & A. Guzmán 2015. Hymenoptera parasitica de México. In: Arredondo Bernal H.C. & L.A. Rodríguez del Bosque (Ed.). Casos de control biológico en México. 29-63. (distribution); Khalaim & Ruíz-Cancino, 2022Khalaim, A.I. & E. Ruíz-Cancino 2022. Darwin wasps of the subfamily Pimplinae (Hymenoptera: Ichneumonidae) of Mexico: Ephialtes genus-group. Zootaxa 5169 (3):201-251. (distribution).
Pimpla xanthothorax Ashmead, 1890:446, Townes & Townes, 1960Townes, H.K. & M. Townes 1960. Ichneumon-flies of America North of Mexico: 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. Bulletin of the United States National Museum 216 (2):1-676.:85, Type ♀ (Washington). - Townes, 1944Townes, H.K. 1944. A catalogue and reclassification of the Nearctic Ichneumonidae (Hymenoptera) - Part I. The subfamilies Ichneumoninae, Tryphoninae, Cryptinae, Phaeogeninae and Lissonotinae. Memoirs of the American Entomological Society 11 (1-2):1-477.:32 ( listed as synonym of Calliephialtes grapholithae (Cresson, in Hamilton, 1890)); Townes & Townes, 1960Townes, H.K. & M. Townes 1960. Ichneumon-flies of America North of Mexico: 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. Bulletin of the United States National Museum 216 (2):1-676.:85 ( listed as synonym of Calliephialtes grapholithae (Cresson, in Hamilton, 1890)). - As Calliephialtes xanthothorax: - Morley, 1914Morley, C. 1914. A revision of the Ichneumonidae based on the collection in the British Museum (Natural History) Part III: Tribes Pimplides and Bassides. British Museum, London, England. 1-148. (distribution); Cushman, 1915Cushman, R.A. 1915. Descriptions of new Ichneumonidae and taxonomic notes. Proceedings of the Entomological Society of Washington 17 (3):132-142.:133 ( listed as synonym of Calliephialtes grapholithae (Cresson, in Hamilton, 1890)).