Cryptus alamedensis Ashmead, 1890:409, 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.:509, Type ♀ (Washington); Gupta, 1982Gupta, S. 1982. A review of the genus Cryptohelcostizus (Hymenoptera: Ichneumonidae). Contributions of the American Entomological Institute 19 (3):1-11.:4, Type ♀ (Washington). - 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 Cryptohelcostizus alamedensis: - 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); Gupta, 1982Gupta, S. 1982. A review of the genus Cryptohelcostizus (Hymenoptera: Ichneumonidae). Contributions of the American Entomological Institute 19 (3):1-11. (distribution).
Cryptohelcostizus rufigaster Cushman, 1919:534, ♂♀. Holotype ♀, Harold, California, April, 1894 (U.S.N.M., No. 21636); 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.:509, Type ♀ (Washington); Gupta, 1982Gupta, S. 1982. A review of the genus Cryptohelcostizus (Hymenoptera: Ichneumonidae). Contributions of the American Entomological Institute 19 (3):1-11.:4, Type ♀ (Washington). - 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.:509 ( listed as synonym of Cryptohelcostizus alamedensis (Ashmead, 1890)); 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.:478 ( listed as synonym of Cryptohelcostizus alamedensis (Ashmead, 1890)); Gupta, 1982Gupta, S. 1982. A review of the genus Cryptohelcostizus (Hymenoptera: Ichneumonidae). Contributions of the American Entomological Institute 19 (3):1-11.:4 ( listed as synonym of Cryptohelcostizus alamedensis (Ashmead, 1890)).