Ischnus proximus Cresson, 1864:187, ♂. ♂, Pennsylvania (leg. E. T. Cresson); Heinrich, 1961Heinrich, G.H. 1961. Synopsis of Nearctic Ichneumoninae Stenopneusticae with particular reference to the northeastern region (Hymenoptera). Part II. Synopsis of the Ichneumonini: genera Orgichneumon, i>Cratichneumon, Homotherus, i>Aculichneumon, Spilichneumon. The Canadian Entomologist 92 (Supplement 18):89-205.:112, Holotype ♂ (A.N.S.); Heinrich, 1977Heinrich, G.H. 1977. Ichneumoninae of Florida and neighboring states (Hymenoptera: Ichneumonidae, subfamily Ichneumoninae). Arthropods of Florida and neighboring land areas 9:1-350.:137, Holotype ♂ (ANS). - As Cratichneumon proximus: - Heinrich, 1977Heinrich, G.H. 1977. Ichneumoninae of Florida and neighboring states (Hymenoptera: Ichneumonidae, subfamily Ichneumoninae). Arthropods of Florida and neighboring land areas 9:1-350. (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).
Ichneumon sagus Cresson, 1867:294, ♂♀. 6 ♀♀, 3 ♂♂, Mass., Conn., N. Y., D. C., Ill.; Heinrich, 1961Heinrich, G.H. 1961. Synopsis of Nearctic Ichneumoninae Stenopneusticae with particular reference to the northeastern region (Hymenoptera). Part II. Synopsis of the Ichneumonini: genera Orgichneumon, i>Cratichneumon, Homotherus, i>Aculichneumon, Spilichneumon. The Canadian Entomologist 92 (Supplement 18):89-205.:112, Holotype ♀ (A.N.S.); Heinrich, 1977Heinrich, G.H. 1977. Ichneumoninae of Florida and neighboring states (Hymenoptera: Ichneumonidae, subfamily Ichneumoninae). Arthropods of Florida and neighboring land areas 9:1-350.:137, Holotype ♀ (ANS). - Cresson, 1867Cresson, E.T. 1867. A list of Ichneumonidae of North America, with descriptions of new species. Part I. Transactions of the American Entomological Society 1:289-312. (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); Heinrich, 1961Heinrich, G.H. 1961. Synopsis of Nearctic Ichneumoninae Stenopneusticae with particular reference to the northeastern region (Hymenoptera). Part II. Synopsis of the Ichneumonini: genera Orgichneumon, i>Cratichneumon, Homotherus, i>Aculichneumon, Spilichneumon. The Canadian Entomologist 92 (Supplement 18):89-205.:112 ( listed as synonym of Cratichneumon proximus (Cresson, 1864)); Heinrich, 1977Heinrich, G.H. 1977. Ichneumoninae of Florida and neighboring states (Hymenoptera: Ichneumonidae, subfamily Ichneumoninae). Arthropods of Florida and neighboring land areas 9:1-350.:137 ( listed as synonym of Cratichneumon proximus (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.:495 ( listed as synonym of Cratichneumon proximus (Cresson, 1864)).