Eupelmus cynipidis Ashmead, 1882:36, ♀. Holotype ♀, Florida (leg. May 2nd); Gibson, 2011Gibson, G.A.P. 2011. The species of Eupelmus (Eupelmus) Dalman and Eupelmus (Episolindelia) Girault (Hymenoptera: Eupelmidae) in North America north of Mexico. Zootaxa 2951:1-97.:51, Holotype ♀, examined (USNM). - Howard, 1885Howard, L.O. 1885. Descriptions of North American Chalcididae from the collections of the U. S. Department of Agriculture and of Dr. C. V. Riley. Bulletin of the U. S. Department of Agriculture 5:3-47. (distribution); Dalla Torre, 1898Dalla Torre, C.G. 1898. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, V. Chalcididae et Proctotrupidae. Sumptibus Guilelmi Engelmann, VII + 598. (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); Gibson, 2011Gibson, G.A.P. 2011. The species of Eupelmus (Eupelmus) Dalman and Eupelmus (Episolindelia) Girault (Hymenoptera: Eupelmidae) in North America north of Mexico. Zootaxa 2951:1-97. (distribution).
Eupelmus quercus Ashmead, 1886:130, Holotype ♀, April, 1881; Gibson, 2011Gibson, G.A.P. 2011. The species of Eupelmus (Eupelmus) Dalman and Eupelmus (Episolindelia) Girault (Hymenoptera: Eupelmidae) in North America north of Mexico. Zootaxa 2951:1-97.:51, Holotype ♀, examined (USNM). Synonymized with Eupelmus cynipidis Ashmead, 1882 by Gibson, 2011Gibson, G.A.P. 2011. The species of Eupelmus (Eupelmus) Dalman and Eupelmus (Episolindelia) Girault (Hymenoptera: Eupelmidae) in North America north of Mexico. Zootaxa 2951:1-97.:51. - Ashmead, 1886Ashmead, W.H. 1886. Studies on the North American Chalcididae, with descriptions of new species from Florida. Transactions of the American Entomological Society 13:125-135. (distribution); Ashmead, 1887Ashmead, W.H. 1887. Studies on the North American Chalcididae, with descriptions of new species, chiefly from Florida. Trans. Am. Entomol. Soc. Phil. 14:183-203. (distribution); Dalla Torre, 1898Dalla Torre, C.G. 1898. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, V. Chalcididae et Proctotrupidae. Sumptibus Guilelmi Engelmann, VII + 598. (distribution); Cockerell, 1899Cockerell, T.D.A. 1899. A first list of the hymenopterous families Tenthredinidae, Siricidae, Chrysididae, Proctotrypidae, Cynipidae, Chalcididae and Braconidae collected in New Mexico. Transactions of the Kansas Academy of Sciences 16:212-216. (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).