Hedychrum dimidiatum Say, 1824:330,Pennsylvania; Bohart & Kimsey, 1978Bohart, R.M. & L.S. Kimsey 1978. A revision of the New World species of Hedychridium (Hymenoptera, Chrysididae). Proceedings of the Biological Society of Washington 91 (3):590-635.:610, Holotype ♀, destroyed; 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, 1958Krombein, K.V. 1958. Additions during 1956 and 1957 to the wasp fauna of Lost River State Park, West Virginia, with biological notes and descriptions of new species (Hymenoptera, Aculeata). Proceedings of the Entomological Society of Washington 60 (2):49-64. (distribution); 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); Bohart & Kimsey, 1978Bohart, R.M. & L.S. Kimsey 1978. A revision of the New World species of Hedychridium (Hymenoptera, Chrysididae). Proceedings of the Biological Society of Washington 91 (3):590-635. (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); Conrow et al., 2016Conrow, R.T., K.M. Zivicki & G.P. Setliff 2016. Cuckoo wasps of Pennsylvania (Hymenoptera: Chrysididae). Transactions of the American Entomological Society 142 (10):113-129. (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); Bohart & Kimsey, 1978Bohart, R.M. & L.S. Kimsey 1978. A revision of the New World species of Hedychridium (Hymenoptera, Chrysididae). Proceedings of the Biological Society of Washington 91 (3):590-635.:610, Holotype ♀ (BMNH, London); 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). Synonymized with Hedychridium dimidiatum (Say, 1824) by Bohart & Kimsey, 1978Bohart, R.M. & L.S. Kimsey 1978. A revision of the New World species of Hedychridium (Hymenoptera, Chrysididae). Proceedings of the Biological Society of Washington 91 (3):590-635.:610. - 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.); Bohart & Kimsey, 1978Bohart, R.M. & L.S. Kimsey 1978. A revision of the New World species of Hedychridium (Hymenoptera, Chrysididae). Proceedings of the Biological Society of Washington 91 (3):590-635.:610, Holotype ♂ (HNHM, Hungary); 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 Bohart & Kimsey, 1978Bohart, R.M. & L.S. Kimsey 1978. A revision of the New World species of Hedychridium (Hymenoptera, Chrysididae). Proceedings of the Biological Society of Washington 91 (3):590-635.:610. 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)).