Perdita ignota Cockerell, 1896:220, ♀. ♀, Mesilla, New Mexico, June 24th, 1896. - Cockerell, 1897Cockerell, T.D.A. 1897. Some species of Perdita from Nebraska. Entomological News 8:23-24. (distribution); Cockerell, 1906Cockerell, T.D.A. 1906. The bees of New Mexico. Transactions of the American Entomological Society 32:289-314. (distribution); Swenk & Cockerell, 1907Swenk, M.H. & Cockerell, T.D.A. 1907. The bees of Nebraska. - I. Entomological News 18:51-58. (distribution); Cockerell, 1907Cockerell, T.D.A. 1907. The bees of Boulder County, Colorado. University of Colorado Studies 4:239-259. (distribution); Cockerell, 1916Cockerell, T.D.A. 1916. Descriptions and records of bees. - LXXI. The Annals and Magazine of Natural History ser. 8: v. 17:277-287. (distribution); Cockerell, 1922Cockerell, T.D.A. 1922. Bees of the genus Perdita from the Western States. American Museum Novitates 33:1-15. (distribution); Timberlake, 1947Timberlake, P.H. 1947. New species of Perdita from the southern states (Hymenoptera, Apoidea). Proceedings of the Entomological Society of Washington 49 (3):81-84. (distribution); Owens et al., 2018Owens, B.E., L. Allain, E.C. van Gorder, J.L. Bossart & C.E. Carlton 2018. The bees (Hymenoptera: Apoidea) of Louisiana: An updated, annotated checklist. Proceedings of the Entomological Society of Washington 120 (2):272-307. (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).