Hypocampsis Pluto Ashmead, 1887:131, ♂♀.Florida; Ashmead, 1893Ashmead, W.H. 1893. A monograph of the North American Proctotrypidae. Bulletin of the United States National Museum 45:1-472.:298, Holotype ♀ (Coll. Ashmead); Fouts, 1924Fouts, R.M. 1924. Revision of the North American wasps of the subfamily Platygasterinae. Proceedings of the United States National Museum 63 (art. 15):1-145.:68, Type (U.S.N.M., No. 24607); Masner & Muesebeck, 1968Masner, L. & C.F.W. Muesebeck 1968. The Types of Proctotrupoidea (Hymenoptera) in the United States National Museum. 270:1-143.:93, Holotype ♀ (USNM, no. 24607). - Ashmead, 1893Ashmead, W.H. 1893. A monograph of the North American Proctotrypidae. Bulletin of the United States National Museum 45:1-472. (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). - As Platygaster pluto: - Fouts, 1920Fouts, R.M. 1920. Some new parasites, with remarks on the genus Platygaster (Hymenoptera). Proceedings of the Entomological Society of Washington 22 (4):61-72.:68 (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 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198. (distribution).