Pseudagenia melanocephala Cameron, 1891:172, ♀. ♀, Mexico, Atoyac in Vera Cruz (leg. H.H. Smith); Evans, 1974Evans, H.E. 1974. A review of the species of Dipogon occurring in Central America, Mexico, and extreme southwestern United States (Hymenoptera, Pompilidae). Transactions of the American Entomological Society 100:29-51.:44, Plesiallotype ♂ (Mus. Comp. Zool.); Evans, 1974Evans, H.E. 1974. A review of the species of Dipogon occurring in Central America, Mexico, and extreme southwestern United States (Hymenoptera, Pompilidae). Transactions of the American Entomological Society 100:29-51.:43, Plesiotype ♀ (Mus. Comp. Zool.); Evans, 1974Evans, H.E. 1974. A review of the species of Dipogon occurring in Central America, Mexico, and extreme southwestern United States (Hymenoptera, Pompilidae). Transactions of the American Entomological Society 100:29-51.:43, Type ♀ (British Museum, no. 19.462). - Cameron, 1888-1900Cameron, P. 1888-1900. Biologia Centrali-Americana - Insecta. Hymenoptera. (Fossores) Vol. II. R. H. Porter and Dulau & Co., London. 413pp, 14 pl.:172 (listed); Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution), 205 (listed). - As Deuteragenia melanocephala: - Lelej & Loktionov, 2012Lelej, A.S. & V.M. Loktionov 2012. Phylogeny and classification of the tribe Deuterageniini (Hymenoptera, Pompilidae: Pepsinae). Far Eastern Entomologist 254:1-15.:8 (comb. nov.). - As Dipogon melanocephalus: - Evans, 1974Evans, H.E. 1974. A review of the species of Dipogon occurring in Central America, Mexico, and extreme southwestern United States (Hymenoptera, Pompilidae). Transactions of the American Entomological Society 100:29-51. (distribution), 43 (comb. nov.); 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); Lelej & Loktionov, 2012Lelej, A.S. & V.M. Loktionov 2012. Phylogeny and classification of the tribe Deuterageniini (Hymenoptera, Pompilidae: Pepsinae). Far Eastern Entomologist 254:1-15. (distribution); Vanoye-Eligio et al., 2021Vanoye-Eligio, M., M. del C. Gómez-Camal, B. del R. Martín-Canché, M. Rosas-Mejía, J.V. HortaVega & V. Vanoye-Eligio 2021. Current knowledge of the family Pompilidae (Hymenoptera: Vespoidea) in Mexico: diversity and geographical distribution. Zootaxa 5071 (4):505-536. (distribution); Fernández et al., 2022Fernández, F., J. Rodriguez, C. Waichert, B. Decker & J. Pitts 2022. Twenty two years later: An updated checklist of Neotropical spider wasps (Hymenoptera: Pompilidae). Zootaxa 5116 (4):451-503. (distribution).