Epyris megacephalus Ashmead, 1893:58 (key), 61, ♀. Holotype ♀, California (Coll. Ashmead); Evans, 1965Evans, H.E. 1965. A revision of the genus Rhabdepyris in the Americas (Hymenoptera, Bethylidae). Bulletin of the Museum of Comparative Zoology at Harvard College 133 (2):67-151, 6 pl.:87, Plesiallotype ♂, Arizona: Tucson, 13 June 1938 (MCZ, leg. R.H. Crandall); Evans, 1965Evans, H.E. 1965. A revision of the genus Rhabdepyris in the Americas (Hymenoptera, Bethylidae). Bulletin of the Museum of Comparative Zoology at Harvard College 133 (2):67-151, 6 pl.:85, Type ♀, California (U.S.N.M., No. 14,067). - As Anisepyris megacephalus: - Waichert & Azevedo, 2009Waichert, C. & C.A. Azevedo 2009. Phylogenetic analysis of Rhabdepyris (Hymenoptera: Bethylidae) and redefinition of generic limits based on structural characters. Zootaxa 2284:1-29.:23 (comb. nov.). - As Epyris megacephala: - Dalla Torre, 1898Dalla Torre, C.G. 1898. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, V. Chalcididae et Proctotrupidae. Sumptibus Guilelmi Engelmann, VII + 598. (distribution). - As Epyris megalocephala: - 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.:1207 (emendation). - As Epyris megalocephala: - 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.:1207 (emendation). - As Rhabdepyris megacephalus: - Evans, 1964Evans, H.E. 1964. A synopsis of the american Bethylidae (Hymenoptera, Aculeata). Bulletin of the Museum of Comparative Zoology 132 (1):1-222. (distribution); Evans, 1965Evans, H.E. 1965. A revision of the genus Rhabdepyris in the Americas (Hymenoptera, Bethylidae). Bulletin of the Museum of Comparative Zoology at Harvard College 133 (2):67-151, 6 pl. (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); Murgas & González, 2006Santos Murgas, A. & P.E. González D. 2006. Dostrobicón de especies de la subfamilia Epyrinae (Hymenoptera: Bethylidae) en Panamá. Tecnociencia 8 (2):37-50. (distribution).