Prosopis rudbeckiæ Cockerell & Casad, 1895:380, ♂. Type ♂, Santa Fé, New Mexico, July 19, 1894 (Am. Ent. Soc., leg. Ckll.). - Cockerell, 1906Cockerell, T.D.A. 1906. The bees of New Mexico. Transactions of the American Entomological Society 32:289-314. (distribution). - As Hylaeus rudbeckiae: - Cockerell & Sumner, 1931Cockerell, T.D.A. & R. Sumner 1931. Rocky Mountain bees. III. American Museum Novitates 490:1-15. (distribution); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538. (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); Wilson et al., 2010Wilson, J.S., L.E. Wilson, L.D. Loftis & T. Griswold 2010. The montane bee fauna of north central Washington, USA, with floral associations. Western North American Naturalist 70 (2):198-207. (distribution).
Prosapis bakeri Cockerell, 1896:26, ♂. ♂, Colorado, seven miles W. of Livermore, Larimer Co., July 1, 1894 (leg. C.F. Baker). - 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.:1768 ( listed as synonym of Hylaeus rudbeckiae (Cockerell & Casad, 1895)). - As Prosopis bakeri: - Cockerell, 1903Cockerell, T.D.A. 1903. A catalogue of the bees of California. Psyche 10:74-78. (distribution); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:73 ( listed as synonym of Hylaeus rudbeckiae (Cockerell & Casad, 1895)).
Prosapis digitatus Cockerell, 1896:30, ♂. ♂, Colorado, Steamboat Springs, July 13, 1894 (leg. C.F. Baker). - 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.:1768 ( listed as synonym of Hylaeus rudbeckiae (Cockerell & Casad, 1895)). - As Prosopis digitata: - Cockerell, 1906Cockerell, T.D.A. 1906. The bees of New Mexico. Transactions of the American Entomological Society 32:289-314. (distribution). - As Prosopis digitatus: - Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:73 ( listed as synonym of Hylaeus rudbeckiae (Cockerell & Casad, 1895)).
Prosapis rudbeckiae ruidosensis Cockerell, 1896:30, ♂. ♂, New Mexico, Ruidoso Creek, 7500 feet, July 6, 1895 (leg. E.O. Wooton). - Cockerell, 1901Cockerell, T.D.A. 1901. Contributions from the New Mexico Biological Station. - X. Observations on bees collected at Las Vegas, New Mexico, and in the adjacent Mountains. II. The Annals and Magazine of Natural History ser. 7: v. 7:125-131. (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.:1768 ( listed as synonym of Hylaeus rudbeckiae (Cockerell & Casad, 1895)). - As Prosopis rudbeckiae ruidosensis: - Cockerell, 1906Cockerell, T.D.A. 1906. The bees of New Mexico. Transactions of the American Entomological Society 32:289-314. (distribution); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:73 ( listed as synonym of Hylaeus rudbeckiae (Cockerell & Casad, 1895)).
Prosapis rudbeckiae subdigitata Cockerell, 1896:31, ♂. ♂, Colorado, Foothills west of Fort Collins, June 15, 1895 (leg. C.F. Baker). - 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.:1768 ( listed as synonym of Hylaeus rudbeckiae (Cockerell & Casad, 1895)). - As Prosopis rudbeckiae subdigitata: - Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:73 ( listed as synonym of Hylaeus rudbeckiae (Cockerell & Casad, 1895)).
Prosopis rudbeckiae granulatus Metz, 1911:114 - Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:73 ( listed as synonym of Hylaeus rudbeckiae (Cockerell & Casad, 1895)).