Cryptus subgracilis Cresson, 1864:303, ♀. ♀, Illinois (leg. Dr. Samuel Lewis); Townes & Townes, 1962Townes, H.K. & M. Townes 1962. Ichneumon-flies of America north of Mexico: 3. Subfamily Gelinae, tribe Mesostenini. Bulletin of the United States National Museum 216 (3):1-602.:366, Type ♀ (Philadelphia); Kasparyan & Ruíz-Cancino, 2005Kasparyan, D.R. & E. Ruíz-Cancino 2005. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae). Parte I. :1-286.:55, Type ♀ (Mus. Filadelfia). - 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 Trychosis subgracilis: - Townes & Townes, 1962Townes, H.K. & M. Townes 1962. Ichneumon-flies of America north of Mexico: 3. Subfamily Gelinae, tribe Mesostenini. Bulletin of the United States National Museum 216 (3):1-602. (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); Ruíz-Cancino & Coronado-Blanco, 2002Ruíz-Cancino, E. & J.M. Coronado-Blanco 2002. Artrópodos terrestres de los estados de Tamaulipas y Nuevo León, México. Serie Publicaciones Cientificas No. 4:1-376. (distribution); Kasparyan & Ruíz-Cancino, 2004Kasparyan, D.R. & E. Ruíz-Cancino 2004. Adenda a Ichneumonidae (Hymenoptera). In: Bousquets, J.L., J.J. Morrone, O.Y. Ordóñez & I.V. Fernández (Ed.). Biodiversidad, Taxonomía y Biogeografía de artrópodos de México: Hacia una síntesis de su conocimiento. Volumen IV. 721-723. (distribution); Kasparyan & Ruíz-Cancino, 2005Kasparyan, D.R. & E. Ruíz-Cancino 2005. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae). Parte I. :1-286. (distribution); Ruíz-Cancino et al., 2010Ruíz-Cancino, E., D.R. Kasparyan, J.M. Coronado-Blanco, S.N. Myartseva, V.A. Trjapitzin, S.G. Hernández Aguilar & J. García Jiménez 2010. Himenópteros de la Reserva “El Cielo”, Tamaulipas, México. Dugesiana 17 (1):53-71. (distribution); Ruíz-Cancino et al., 2011Ruíz-Cancino, E., V.H. Toledo Hernández, A.M. Corona López, J.M. Coronado-Blanco, A.I. Khalaim & E. Tovar Sánchez 2011. Ichneumonidae (Hymenoptera) en selvas y bosques del Estado de Morelos, México. In: Equihua Martínez A., E. Estrada Venegas, J.A. Acuña Sota & M.P. Cháirez Grijalva (Ed.). Memoria del XV Simposio Nacional de Parasitología Forestal - 18 al 20 de Noviembre del 2009. 95-100. (distribution); Sánchez-García et al., 2015Sánchez-García, J.A., R.Jarquín-López, L. Martínez-Martínez, J.M. Coronado-Blanco & E. Ruíz-Cancino 2015. Ichneumonoidea (Hymenoptera) del estado de Oaxaca, México. Entomología mexicana 2:823-829. (distribution).
Cryptus rufoannulatus Provancher, 1874:202, Townes & Townes, 1962Townes, H.K. & M. Townes 1962. Ichneumon-flies of America north of Mexico: 3. Subfamily Gelinae, tribe Mesostenini. Bulletin of the United States National Museum 216 (3):1-602.:366, Lectotype ♀ (Quebec). - Townes & Townes, 1962Townes, H.K. & M. Townes 1962. Ichneumon-flies of America north of Mexico: 3. Subfamily Gelinae, tribe Mesostenini. Bulletin of the United States National Museum 216 (3):1-602.:366 ( listed as synonym of Trychosis subgracilis (Cresson, 1864)); 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.:455 ( listed as synonym of Trychosis subgracilis (Cresson, 1864)).
Cryptus nivalis Cameron, 1885:203,Mexico, Ciudad in Durango 8100 feet (leg. Forrer). - Cameron, 1883-1888Cameron, P. 1883-1888. Biologia Centrali-Americana - Insecta. Hymenoptera. (Families Tenthredinidae-Chrysididae). Taylor and Francis, Red Lion Court, Fleet Street. 487 pp., 20 pl.:203 (listed); Kasparyan & Ruíz-Cancino, 2005Kasparyan, D.R. & E. Ruíz-Cancino 2005. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae). Parte I. :1-286.:55 ( listed as synonym of Trychosis subgracilis (Cresson, 1864)).
Cryptus cameronii Dalla Torre, 1901:564, no descr. Replacement name for Cryptus nivalis Cameron, 1885 by 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.:564 (non Zetterstedt). - 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 Trychosis cameronii: - Ruíz-Cancino et al., 2002Ruíz-Cancino, E., D.R. Kasparyan & J.M. Coronado Blanco 2002. Ichneumonidae. In: Llorente Bousquets, J. & J.J. Morrone (Ed.). Biodiversidad, taxonomía y biogeografía de artrópodos de México: Hacia una síntesis de su conocimiento, volumen III. 631-646. (distribution); Kasparyan & Ruíz-Cancino, 2005Kasparyan, D.R. & E. Ruíz-Cancino 2005. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae). Parte I. :1-286.:55 ( listed as synonym of Trychosis subgracilis (Cresson, 1864)).