Osmia coloradensis Cresson, 1878:105, ♀. 6 ♀♀, Colorado (leg. Ridings, Morrison). - 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 Osmia, found in North America. Proceedings of the United States National Museum 42:215-225. (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); Ayala & Griswold, 2005Ayala, R. & T. Griswold 2005. Nueva especie de abeja del género Osmia (Hymenoptera: Megachilidae) de México. Folia Entomológica Mexicana 44 (Supl. 1):139-145. (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); Nava-Bolaños & Osorio-Olvera, 2022Nava-Bolaños, A. & L. Osorio-Olvera 2022. Estado del arte del conocimiento de biodiversidad de los polinizadores de México. Revista Mexicana de Biodiversidad 93:1-77. (distribution).
Osmia hypochrysea Cockerell, 1906:449, ♀. Holotype ♀, Florissant, July 12, 1906 (leg. Sievert A. Rohwer). - Cockerell, 1912Cockerell, T.D.A. 1912. Names applied to bees of the genus Osmia, found in North America. Proceedings of the United States National Museum 42:215-225. (distribution); Cockerell, 1934Cockerell, T.D.A. 1934. Records of Western bees. American Museum Novitates 697:1-15. (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.:2034 ( listed as synonym of Osmia coloradensis Cresson, 1878).
Osmia hypochrysea Rohweri Cockerell, 1907:366, ♀. ♀, Boulder, Colorado, May 1906 (leg. S.A. Rohwer). - Cockerell, 1912Cockerell, T.D.A. 1912. Names applied to bees of the genus Osmia, found in North America. Proceedings of the United States National Museum 42:215-225. (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.:2034 ( listed as synonym of Osmia coloradensis Cresson, 1878).
Osmia pasadenae Cockerell, 1910:122 - Cockerell, 1912Cockerell, T.D.A. 1912. Names applied to bees of the genus Osmia, found in North America. Proceedings of the United States National Museum 42:215-225. (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.:2034 ( listed as synonym of Osmia coloradensis Cresson, 1878).