Melissodes apacha Cresson, 1878:217, ♀. 6 ♂♀, Texas, New Mexico, Arizona (American Entomology Society). - Cresson, 1878Cresson, E.T. 1878. Descriptions of new species of North American bees. Proceedings of the Entomological Society of Philadelphia 30:181-221. (distribution); Cresson, 1879Cresson, E.T. 1879. Catalogue of North American Apidae. Transactions of the American Entomological Society and Proceedings of the Entomological Section of the Academy of Natural Sciences 7:215-232. (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.:2121 ( listed as synonym of Diadasia diminuta (Cresson, 1878)). - As Diadasia apacha: - Fox, 1893Fox, W.J. 1893. Report on some mexican Hymenoptera, principally from lower California. Proceedings of the California Academy of Sciences ser.2 (4):1-25. (distribution); Cockerell, 1899Cockerell, T.D.A. 1899. Catálogo de las Abejas de Mexico. Biblioteca Agricola de las Secretaria de Fomento, Mexico, 1-20. (distribution); Cockerell, 1901Cockerell, T.D.A. 1901. Flower and insect records from New Mexico. Entomological News 12 (2):38-43. (distribution); Cockerell, 1905Cockerell, T.D.A. 1905. Diadasia Patton; a genus of bees. American Naturalist 39 (466):741-745.:744 ( listed as synonym of Diadasia diminuta (Cresson, 1878)). - As Eucera apacha: - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution).
Melissodes diminuta Cresson, 1878:215, ♂. 2 ♂♂, Colorado (American Entomology Society, leg. Morrison). - As Diadasia diminuta: - Fox, 1893Fox, W.J. 1893. Report on some mexican Hymenoptera, principally from lower California. Proceedings of the California Academy of Sciences ser.2 (4):1-25. (distribution); Cockerell, 1898Cockerell, T.D.A. 1898. On some Panurginae and other bees. Transactions of the American Entomological Society 25:185-198. (distribution); Cockerell, 1899Cockerell, T.D.A. 1899. Catálogo de las Abejas de Mexico. Biblioteca Agricola de las Secretaria de Fomento, Mexico, 1-20. (distribution); Cockerell, 1900Cockerell, T.D.A. 1900. Notes on New Mexico bees. The Canadian Entomologist 32:361-364. (distribution); Cockerell, 1905Cockerell, T.D.A. 1905. Diadasia Patton; a genus of bees. American Naturalist 39 (466):741-745. (distribution); Cockerell, 1905Cockerell, T.D.A. 1905. The bees of southern California. - VII. Bulletin of the Southern California Academy of Sciences 4 (1):13-15. (distribution); Cockerell, 1906Cockerell, T.D.A. 1906. The North American bees of the family Anthophoridae. Transactions of the American Entomological Society 32 (1):63-116. (distribution); Cockerell, 1906Cockerell, T.D.A. 1906. The bees of New Mexico. Transactions of the American Entomological Society 32:289-314. (distribution); Lutz & Cockerell, 1920Lutz, F.E. & T.D.A. Cockerell 1920. Notes on the distribution and bibliography of North American bees of the families, Apidae, Meliponidae, Bombidae, Euglossidae, and Anthophoridae. Bull. Amer. Mus. Nat. Hist 42 (15):491-641. (distribution); Cockerell, 1923Cockerell, T.D.A. 1923. Expedition of the California Academy of Sciences to the Gulf of California in 1921. The bees (I). Proceedings of the California Academy of Sciences ser. 4: v. 12 (7):73-103. (distribution); Cockerell, 1927Cockerell, T.D.A. 1927. Some North and South American bees. Annals of the Entomological Society of America 20:393-400. (distribution); Cockerell, 1930Cockerell, T.D.A. 1930. Bees from Mesa Verde, Colorado, in the American Museum of Natural History. American Museum Novitates 397:1-8. (distribution); Michener, 1936Michener, C.D. 1936. Some western Anthophorid and Nomiine bees. American Museum Novitates 876:1-4. (distribution); Cockerell, 1937Cockerell, T.D.A. 1937. Bees collected by Mr. and Mrs. J. L. Sperry and Mr. R. H. Andrews in Arizona. Bulletin of the Southern California Academy of Sciences 36 (3):107-110. (distribution); Linsley & MacSwain, 1957Linsley, E.G. & J.W. MacSwain 1957. The nesting habits, flower relationships, and parasites of some North American species of Diadasia (Hymenoptera: Anthophoridae). The Wasmann Journal of Biology 15 (2):199-235. (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); Vergara & Ayala, 2002Vergara, C.H. & R. Ayala 2002. Diversity, Phenology and Biogeography of the bees (Hymenoptera: Apoidea) of Zapotitlán de las Salinas, Puebla, Mexico. Journal of the Kansas Entomological Society 75 (1):16-30. (distribution); Yáñez-Ordóñez & Hinojosa-Díaz, 2004Yáñez-Ordóñez, O. & I. Hinojosa-Díaz 2004. La colección himenopterológica (Insecta) del Museo de Zoología Alfonso L. Herrera de la Facultad de Ciencias, UNAM, México. Acta Zoológica Mexicana (nueva serie) 20 (1):167-197. (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). - As Diadasia dimituna: - Esperanza de Pedro, 2021Esperanza de Pedro, D. 2021. . :. (distribution). - As Eucera diminuta: - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution), 231 (comb. nov.).