Prosopis subtilis Cockerell, 1895:295, ♀. ♀, Las Cruces, New Mexico, Aug. 24, 1894 (leg. Ckll.). - 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 mesillae mesillae (Cockerell, 1896)).
Prosopis mesillae Cockerell, 1896:42, no description Replacement name for Prosopis subtilis Cockerell, 1895 by Cockerell, 1896Cockerell, T.D.A. 1896. Prosopis subtilis. The Canadian Entomologist 28:42.:42 (not P. subtilis, Forst). - Cockerell, 1897Cockerell, T.D.A. 1897. Contributions from the New Mexico Biological Station. - VI. The New Mexico bees of the genus Heriades, and a new Halictus. The Annals and Magazine of Natural History ser. 6: v. 20:135-143. (distribution); Cockerell, 1901Cockerell, T.D.A. 1901. Flower and insect records from New Mexico. Entomological News 12 (2):38-43. (distribution); Cockerell, 1903Cockerell, T.D.A. 1903. A catalogue of the bees of California. Psyche 10:74-78. (distribution); Cockerell, 1904Cockerell, T.D.A. 1904. Descriptions and records of bees. The Annals and Magazine of Natural History ser. 7: v. 14:21-30. (distribution); Cockerell, 1904Cockerell, T.D.A. 1904. New records of bees. The Entomologist 37:231-236. (distribution); Cockerell, 1906Cockerell, T.D.A. 1906. The bees of New Mexico. Transactions of the American Entomological Society 32:289-314. (distribution). - As Hylaeus mesillae mesillae: - 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); Ruíz-Cancino & Coronado-Blanco, 2002Ruíz-Cancino, E. & J.M. Coronado-Blanco 2002. Artrópodos terrestres de los estados de Tamaulipas y Nuevo León, México. Serie Publicaciones Cientificas No. 4:1-376. (distribution).
Prosopis cressoni magniclavis Swenk & Cockerell, 1910:68, ♂♀. Types, Bad Lands, Sioux County, Nebraska, August 10, 1908 (University of Nebraska, leg. R.W. Dawson). - Metz, 1911Metz, C.W. 1911. A revision of the genus Prosopis in North America. Transactions of the American Entomological Society 37:85-156. (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 mesillae mesillae (Cockerell, 1896)).