Halictus tripartitus Cockerell, 1895:63, ♀. ♀, Santa Fé, N.M., June 27, 1894 (leg. Ckll.); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:35, Type (U. S. National Museum). - Cockerell, 1906Cockerell, T.D.A. 1906. The bees of New Mexico. Transactions of the American Entomological Society 32:289-314. (distribution); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl. (distribution); Cockerell, 1942Cockerell, T.D.A. 1942. Collecting wild bees in the Yosemite. The Pan-Pacific Entomologist 18:136-139. (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); Mayer et al., 2000Mayer, D.F., E.R. Miliczky, B.F. Finnigan & C.A. Johansen 2000. The bee fauna (Hymenoptera: Apoidea) of southeastern Washington. Journal of the Entomological Society of British Columbia 97:25-32. (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).
Halictus meliloti Cockerell, 1895:67, ♀. ♀, College Farm, Mesilla Valley, N.M., May 1, 1895; Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:35, Type (Citrus Experiment Station at Riverside, Calif.). Synonymized with Halictus tripartitus Cockerell, 1895 by Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:35. - Cockerell, 1898Cockerell, T.D.A. 1898. On some small bees from Arizona. The Canadian Entomologist 30:237-239. (distribution); Cockerell, 1899Cockerell, T.D.A. 1899. Notes on american bees (Concluded from p. 129). The Entomologist 32:154-159. (distribution); Cockerell, 1907Cockerell, T.D.A. 1907. The bees of Boulder County, Colorado. University of Colorado Studies 4:239-259. (distribution); Cockerell, 1907Cockerell, T.D.A. 1907. New american bees. - V. The Entomologist 40 (535):265-269. (distribution); Cockerell, 1928Cockerell, T.D.A. 1928. Some bees from Utah. Psyche 35 (4):232-234. (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. On certain Halictidae from Northern California. The Pan Pacific Entomologist 12 (4):165-172. (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.:1956 ( listed as synonym of Halictus tripartitus Cockerell, 1895).
Halictus catalinensis Cockerell, 1903:84, ♀. 3 ♀♀, Avalon, Catalina Island, California, Aug., 1901 (leg. Ada Springer); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:35, Type (U. S. National Museum). Synonymized with Halictus tripartitus Cockerell, 1895 by Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:35. - Cockerell, 1916Cockerell, T.D.A. 1916. The bees of the Coronado Islands. The Canadian Entomologist 48 (2):54-58. (distribution); Cockerell, 1925Cockerell, T.D.A. 1925. Bees in the collection of California Academy of Sciences. Proceedings of the California Academy of Sciences ser. 4: v. 14 (11):185-215. (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.:1956 ( listed as synonym of Halictus tripartitus Cockerell, 1895).