Nomada Belfragei Cresson, 1878:72, ♀. ♀, Texas (leg. G.W. Belfrage); Muma, 1952Muma, M.H. 1952. Insect types in the collections of the University of Nebraska State Museum. Bulletin of the University of Nebraska State Museum 3 (8):1-35.:20, Allotype ♂ (University of Nebraska State Museum). - Cresson, 1879Cresson, E.T. 1879. Catalogue of North American Apidae. Transactions of the American Entomological Society and Proceedings of the Entomological Section of the Academy of Natural Sciences 7:215-232. (distribution); Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Cockerell, 1912Cockerell, T.D.A. 1912. Names applied to bees of the genus Nomada, found in North America. Proceedings of the United States National Museum 41:225-243. (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); Alexander & Schwarz, 1994Alexander, B.A. & M. Schwarz 1994. A Catalog of the Species of Nomada (Hymenoptera: Apoidea) of the World. The University of Kansas Science Bulletin 55 (7):239-270. (distribution).
Nomada belfragei xanthogaster Cockerell, 1911:644, ♀. Holotype ♀, Texas (U.S.N.M., No. 13427, leg. Belfrage); Cockerell, 1912Cockerell, T.D.A. 1912. Names applied to bees of the genus Nomada, found in North America. Proceedings of the United States National Museum 41:225-243.:227, Type (U.S.N.M., No. 13427); Cockerell, 1912Cockerell, T.D.A. 1912. Names applied to bees of the genus Nomada, found in North America. Proceedings of the United States National Museum 41:225-243.:227, Type (U.S.N.M., No. 13427). - Cockerell, 1912Cockerell, T.D.A. 1912. Names applied to bees of the genus Nomada, found in North America. Proceedings of the United States National Museum 41:225-243. (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.:2111 ( listed as synonym of Nomada belfragei Cresson, 1878); Alexander & Schwarz, 1994Alexander, B.A. & M. Schwarz 1994. A Catalog of the Species of Nomada (Hymenoptera: Apoidea) of the World. The University of Kansas Science Bulletin 55 (7):239-270.:254 ( listed as synonym of Nomada belfragei Cresson, 1878).