Pristomerus mellæthorax Riley, in Riley & Howard, 1890:156, sex not indicated Nomen nudum. Nomen nudum. - Riley & Howard, 1890Riley & Howard 1890. Some of the bred parasitic Hymenoptera in the National Collection (Continued from p. 18). Insect Life 3 (4):151-158. (distribution); Cushman, 1920Cushman, R.A. 1920. North American Ichneumon-flies, new and described, with taxonomic and nomenclatorial notes. Proceedings of the United States National Museum 58:251-292. (distribution).Pristomerus mellæthorax Riley, in Riley & Howard, 1890:156, sex not indicated Nomen nudum. Nomen nudum. - Riley & Howard, 1890Riley & Howard 1890. Some of the bred parasitic Hymenoptera in the National Collection (Continued from p. 18). Insect Life 3 (4):151-158. (distribution); Cushman, 1920Cushman, R.A. 1920. North American Ichneumon-flies, new and described, with taxonomic and nomenclatorial notes. Proceedings of the United States National Museum 58:251-292. (distribution).
Pristomerus euryptychiae Ashmead, 1896:192, sex not indicated. Holotype, District of Columbia, bred May 19, 1884; Cushman, 1920Cushman, R.A. 1920. North American Ichneumon-flies, new and described, with taxonomic and nomenclatorial notes. Proceedings of the United States National Museum 58:251-292.:278, Type (U.S.N.M.). - 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); Cushman, 1920Cushman, R.A. 1920. North American Ichneumon-flies, new and described, with taxonomic and nomenclatorial notes. Proceedings of the United States National Museum 58:251-292.:278 ( listed as synonym of Pristomerus agilis (Cresson, 1872)); 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 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); Ruíz-Cancino et al., 2012Ruíz-Cancino, E., J.M. Coronado-Blanco, A.I. Khalaim, D.R. Kasparyan, A.M. Corona López & E.T. Sánchez 2012. Ichneumonidae (Hym.) de algunos estados del centro de México. Entomología mexicana 11 (2):1039-1044. (distribution).
Pristomerus ocellatus Cushman, 1920:277, ♀. Type ♀, Pyziton, Clay County, Alabama (U.S.N.M., No. 22863). - Cushman, 1920Cushman, R.A. 1920. North American Ichneumon-flies, new and described, with taxonomic and nomenclatorial notes. Proceedings of the United States National Museum 58:251-292. (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.:683 ( listed as synonym of Pristomerus euryptychiae Ashmead, 1896).