Agapostemon femoratus Crawford, 1901:162, Sandhouse, 1936Sandhouse, G.A. 1936. The bees of the genus Agapostemon (Hymenoptera: Apoidea) occuring in the United States. Journal of the Washington Academy of Sciences 26 (2):70-83.:80, Lectotype (United States National Museum); 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.:15, Types ♂♂ (University of Nebraska State Museum); Roberts, 1972Roberts, R.B. 1972. Revision of the bee genus Agapostemon (Hymenoptera: Halictidae). The University of Kansas Science Bulletin 49 (9):437-590.:482, Type ♂ (U.S. National Museum). Synonymized with Agapostemon cockerelli Crawford, 1901 by Sandhouse, 1936Sandhouse, G.A. 1936. The bees of the genus Agapostemon (Hymenoptera: Apoidea) occuring in the United States. Journal of the Washington Academy of Sciences 26 (2):70-83.:79. - Cockerell, 1903Cockerell, T.D.A. 1903. A catalogue of the bees of California. Psyche 10:74-78. (distribution); Cockerell, 1927Cockerell, T.D.A. 1927. Bees of the genera Agapostemon and Augochlora in the collection of the California Academy of Sciences. The Pan-Pacific Entomologist 3 (4):153-162. (distribution); Cockerell, 1935Cockerell, T.D.A. 1935. Some California bees (Continued from page 48). The Pan Pacific Entomologist 11 (2):49-54. (distribution); Roberts, 1972Roberts, R.B. 1972. Revision of the bee genus Agapostemon (Hymenoptera: Halictidae). The University of Kansas Science Bulletin 49 (9):437-590. (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); Esperanza de Pedro, 2021Esperanza de Pedro, D. 2021. . :. (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).