Psenia atricornis Malloch, 1933:57, ♂♀. Allotype ♀, Baragua, Cuba, February 12, 1925 (R. P. R. F., Ent. No,. 346, leg. C. F. Stahl); Holotype ♂, Aguadilla, Puerto Rico, January 1899 (U.S.N.M., No. 44228, leg. A. Busck). - As Pluto atricornis: - Maldonado & Navarro, 1967Maldonado, J. & Navarro, C.A. 1967. Additions and corrections to Wolcott's 'Insects of Puerto Rico'. Caribbean Journal of Science 7 (1-2):45-64. (distribution); Alayo, 1976Alayo, P.D. 1976. Introducción al estudio de los Himenópteros de Cuba - Superfamilia Sphecoidea. Academia de Ciencias de Cuba, Instituto de Zoologia, Serie Biologica 67:1-46. (distribution); van Lith, 1979van Lith, J.P. 1979. The New World genus Pluto (Hymenoptera, Sphecidae, Psenini). Tijdschrift voor Entomologie 122:127-239. (distribution); Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139. (distribution); Perez-Gelabert, 2008Perez-Gelabert, D.E. 2008. Arthropods of Hispaniola (Dominican Republic and Haiti): A checklist and bibliography. Zootaxa 1831:1-530. (distribution); Medina, 2016Medina Rosa, J.R. 2016. Avispas de Puerto Rico - Hymenoptera: Symphyta, Apocrita (Aculeata). Ediciones Digitales, 1-23. (distribution); Perez-Gelabert, 2020Perez-Gelabert, D.E. 2020. Checklist, bibliography and quantitative data of the arthropods of Hispaniola. Zootaxa 4749:1-668. (distribution).