Cryptus subclavatus Harris, 1835:584 Nomen nudum. Nomen nudum.Cryptus subclavatus Harris, 1835:584 Nomen nudum. Nomen nudum.
Cryptus subclavàtus Say, 1836:237,United States. - 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 Endasys subclavatus: - 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); Castillo et al., 2014Castillo Flores, P.M., E. Ruíz Cancino, J.M. Coronado Blanco, A.I. Khalaim & S.N. Myartseva 2014. Ichneumonidae (Hymenoptera: Ichneumonoidea) en un bosque de Quercus de Tamaulipas, México. Dugesiana 21 (2):161-174. (distribution); Castillo-Flores et al., 2014Castillo-Flores, P.M., S. Bordera, E. Ruíz-Cancino & J.M. Coronado-Blanco 2014. Nuevos registros para México de tres especies de Endasys Foerster, 1869 (Hymenoptera: Ichneumonidae). Acta Zoológica Mexicana (nueva serie) 30 (3):723-726. (distribution).
Phygadeuon vulgaris Cresson, 1864:310, ♀. 10 ♀♀, Penn., Del.; Illinois (leg. Dr. Wilson; Dr. Lewis). - Cresson, 1864Cresson, E.T. 1864. Descriptions of North American Hymenoptera, in the Collection of the Entomological Society of Philadelphia. Proceedings of the Entomological Society of Philadelphia 3:257-321. (distribution); 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); 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.:418 ( listed as synonym of Endasys subclavatus (Say, 1836)).
Ichneumon inflatus Provancher, 1875:83 - 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.:418 ( listed as synonym of Endasys subclavatus (Say, 1836)).
Platylabus ruficornis Provancher, 1886:36 - 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); 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.:418 ( listed as synonym of Endasys subclavatus (Say, 1836)).
Melophron monticola Ashmead, 1900:319 Nomen nudum. Nomen nudum.Melophron monticola Ashmead, 1900:319 Nomen nudum. Nomen nudum.
Mesochorus patulus Viereck, 1911:192, sex not indicated Replacement name for Mesochorus areolatus Viereck, 1903 by Viereck, 1911Viereck, H.L. 1911. Descriptions of six new genera and thirty-one new species of Ichneumon flies. Proceedings of the United States National Museum 40:173-196.:192.
Phygadeuon patulus Viereck, 1911:193 - 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.:418 ( listed as synonym of Endasys subclavatus (Say, 1836)).
Phygadeuon brittoni Viereck, 1917:336 - 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.:418 ( listed as synonym of Endasys subclavatus (Say, 1836)).