Rhathymus bicolor Lepeletier & Serville. 1828:448 - Lepeletier, 1841Lepeletier de Saint-Fargeau, A. 1841. Histoire Naturelles des Insectes. Hyménoptères. Vol. 2. Paris. (distribution); Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Alfken, 1933Alfken, J.D. 1933. Ergebnisse einer zoologischen Sammelreise nach Brasilien, inbesondere in das Amazonasgebeit, ausgeführt von Dr. H. Zerny. IX Teil. Hymenoptera: Apidae. Annalen des Naturhistorischen Museums in Wien 45:303-307. (distribution); Starr & Hook, 2003Starr, C.K. & Hook, A.W. 2003. The aculeate Hymenoptera of Trinidad, West Indies. Occasional Papers o the Department of Life Sciences, University of the West Indies 12:1-31. (distribution); Silvestre et al., 2014Silvestre, R., M.F. Demétrio, B.M. Trad, F. Varussa & O. Lima 2014. Diversity and distribution of Hymenoptera Aculeata in Midwestern Brazilian dry forests. In: Greer, F.E. (Ed.). Dry Forests. 29-80. (distribution); Oliveira Lima & Silvestre, 2017Oliveira Lima, F.V. de & R. Silvestre 2017. Abelhas (Hymenoptera, Apidae sensu lato) do Estado de Mato Grosso do Sul, Brasil. Iheringia Série Zoologia 107 (supl.):1-14. (distribution); Ayala et al., 2019Ayala, R., I.A. Hinojosa-Díaz & A.G. Armas-Quiñonez 2019. A new species of Rhathymus Lepeletier & Serville, 1828 (Hymenoptera: Apidae: Rhathymini) from Guatemala. Zootaxa 4700 (1):132-138. (distribution); Bossert et al., 2020Bossert, S., R.S. Copeland, T.J.L. Sless, M.G. Branstetter, J.P. Gillung, S.G. Brady, B.N. Danforth, J. Policarová & J. Straka 2020. Phylogenomic and morphological reevaluation of the bee tribes Biastini, Neolarrini, and Townsendiellini (Hymenoptera: Apidae) with description of three new species of Schwarzia. Insect Systematics and Diversity 4 (6):1-29. (distribution).
Rathymus bicolor nigripes Friese, 1912:222, ♂♀.Tarata (Bolivia);Columbien;Villa Rica (Paraguay) (leg. Burgdorf); ♀, Cayenne (leg. Lepeletier); ♀, Uberaba (n.-Brasil); ♂, ♀, Campinas (São Paulo), 26. Februar (leg. C. Hempel).