Hedychrum dimidiatum Say, 1824:330,Pennsylvania; Kimsey, 2006Kimsey, L.S. 2006. California Cuckoo Wasps in the Family Chrysididae (Hymenoptera). University of California Press, Berkeley, Los Angeles, London. 1-311.:49, Holotype ♀, destroyed. - Cresson, 1862Cresson, E.T. 1862. Catalogue of the described species of North American Hymenoptera (Continued from page 211.). Proceedings of the Entomological Society of Philadelphia 1 (8):227-238. (distribution); Norton, 1879Norton, E. 1879. On the Chrysides of North America. Transactions of the American Entomological Society 7:233-242. (distribution). - As Hedychridium dimidiatum: - Krombein, 1963Krombein, K.V. 1963. Natural history of Plummers Island, Maryland. XVII. Annotated list of the wasps (Hymenoptera: Bethyloidea, Scolioidea, Vespoidea, Pompiloidea, Sphecoidea). Proceedings of the Biological Society of Washington 76:255-280. (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 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution); Kimsey, 2006Kimsey, L.S. 2006. California Cuckoo Wasps in the Family Chrysididae (Hymenoptera). University of California Press, Berkeley, Los Angeles, London. 1-311. (distribution). - As Holopyga dimidiata: - Dalla Torre, 1892Dalla Torre, C.G. 1892. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VI: Chrysididae (Tubulifera). Breitkopf & Härtel, Leipzig. 1-118. (distribution).
Chrysis mexicana Cameron, 1888:460,Mexico, Zacatecas city (leg. Höge); Kimsey, 2006Kimsey, L.S. 2006. California Cuckoo Wasps in the Family Chrysididae (Hymenoptera). University of California Press, Berkeley, Los Angeles, London. 1-311.:50, Holotype ♀ (BMNH). - 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.:460 (listed); Dalla Torre, 1892Dalla Torre, C.G. 1892. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VI: Chrysididae (Tubulifera). Breitkopf & Härtel, Leipzig. 1-118. (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 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1226 ( listed as synonym of Hedychridium dimidiatum (Say, 1824)). - As Chrysis mexicanum: - Kimsey, 2006Kimsey, L.S. 2006. California Cuckoo Wasps in the Family Chrysididae (Hymenoptera). University of California Press, Berkeley, Los Angeles, London. 1-311.:50 ( listed as synonym of Hedychridium dimidiatum (Say, 1824)).
Holopyga mexicana Mocsary, 1911:448, ♂.Mexico (Mus. Hung.); Kimsey, 2006Kimsey, L.S. 2006. California Cuckoo Wasps in the Family Chrysididae (Hymenoptera). University of California Press, Berkeley, Los Angeles, London. 1-311.:50, Holotype ♂ (TMB). Synonymized with Hedychridium dimidiatum (Say, 1824) by 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 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1226. - As Hedychridium mexicanum: - Bischoff, 1913Bischoff, H. 1913. Hymenoptera. Fam.Chrysididae. In: Wytsman (Ed.). Genera Insectorum. 1-86. (distribution). - As Holopyga mexicanum: - Kimsey, 2006Kimsey, L.S. 2006. California Cuckoo Wasps in the Family Chrysididae (Hymenoptera). University of California Press, Berkeley, Los Angeles, London. 1-311.:50 ( listed as synonym of Hedychridium dimidiatum (Say, 1824)).