Halictus ligatus Say, 1837:396, ♂♀. ♂, ♀, United States; Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:28, lost; Krombein, 1953Krombein, K.V. 1953. The wasps and bees of the Bimini Island Group, Bahamas, British West Indies (Hymenoptera: Aculeata). American Museum Novitates 1633:1-29.:20, type no longer in existence. - Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7 (14):315-356. (distribution); Cockerell, 1897Cockerell, T.D.A. 1897. The bees of the genus Halictus found in New Mexico. I. Species without any green or blue. Transactions of the American Entomological Society 24:163-168. (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, 1899Cockerell, T.D.A. 1899. The bees of Kansas. Entomological News 10 (1):3-4. (distribution); Cockerell, 1899Cockerell, T.D.A. 1899. Notes on american bees. The Entomologist 32:128-129. (distribution); Cockerell, 1899Cockerell, T.D.A. 1899. Notes on american bees (Concluded from p. 129). The Entomologist 32:154-159. (distribution); Cockerell, 1914Cockerell, T.D.A. 1914. Bees visiting Helianthus. The Canadian Entomologist 46 (12):409-415. (distribution); Graenicher, 1927Graenicher, S. 1927. Bees of the genus Halictus from Miami, Florida. Psyche 34:203-208. (distribution); Michener, 1936Michener, C.D. 1936. On certain Halictidae from Northern California. The Pan Pacific Entomologist 12 (4):165-172. (distribution); Cockerell, 1941Cockerell, T.D.A. 1941. Observations on plants and insects in northwestern Baja California, Mexico, with descriptions of new bees. Trans. San Diego Soc. Nat. Hist. 9 (31):337-352. (distribution); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl. (distribution); Michener, 1947Michener, C.D. 1947. Bees of a limited area in southern Mississippi (Hymenoptera; Apoidea). The American Midland Naturalist 38 (2):443-455. (distribution); Krombein, 1953Krombein, K.V. 1953. The wasps and bees of the Bimini Island Group, Bahamas, British West Indies (Hymenoptera: Aculeata). American Museum Novitates 1633:1-29. (distribution); Michener, 1954Michener, C.D. 1954. Bees of Panamá. Bulletin of the American Museum of Natural History 104 (1):1-176. (distribution); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538. (distribution); Alayo, 1973Alayo, P.D. 1973. Catálogo de los Himenopteros de Cuba. Instituto Cubano del libro, La Habana. 1-218. (distribution); Alayo, 1976Alayo, P.D. 1976. Introducción al estudio de los himenópteros de Cuba. Apoidea. Serie Biológica 68:1- 61. (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); Zayas, 1982Zayas, F. de 1982. Sección Oligoneoptera - Orden Hymenoptera - Orden Strepsiptera. Editorial Científico-Técnica, Ciudad de la Habana. 1-111. (distribution); Raw, 1985Raw, A. 1985. The ecology of Jamaican bees (Hymenoptera). Revista Brasileira de Entomologia 29 (1):1-16. (distribution); Ayala, 1988Ayala, R. 1988. Abejas silvestres (Hymenoptera: Apoidea) de Chamela, Jalisco, México. Folia Entomológica Mexicana 77:395-493. (distribution); Maes, 1993Maes, J.-M. 1993. Catalogo de los Apoidea (Hymenoptera) de Nicaragua. Revista Nicaraguense de Entomologia 26:11-30. (distribution); Estrada de Léon & Ayala Barajas, 1995Estrada de Léon, M. & R. Ayala Barajas 1995. Abejas silvestres (Hymenoptera: Apoidea) de la Sierra del Tigre, Jalisco. Apicultura Moderna 7:12-24. (distribution); Pascarella et al., 1999Pascarella, J.B., Waddington, K.D. & Neal, P.R. 1999. The Bee Fauna (Hymenoptera: Apoidea) of Everglades National Park, Florida and adjacent areas: Distribution, Phenology, and Biogeography. Journal of the Kansas Entomological Society 72 (1):32-45. (distribution); Packer, 1999Packer, L. 1999. The distribution of Halictus ligatus Say and H. poeyi Lep. (Hymenoptera: Halictidae) in North America. In: Byers, G.W., R.H. Hagen & R.W. Brooks (Ed.). Entomological Contributions in Memory of Byron A. Alexander. 81-84. (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); Fernández Triana et al., 2002Fernández Triana, J.L., H. Saríol, M.A. Vega Castillo, S. Ricardo & M. González 2002. Datos preliminares sobre la biodiversidad del orden Hymenoptera en la provincia Granma, Cuba. Boletín de la Sociedad Entomológica Aragonesa 31:43-48. (distribution); Rodríguez Velázquez & Mestre Novoa, 2002Rodríguez Velázquez, D. & Mestre Novoa, N. 2002. Lista de los Collembola e Insecta (Coleoptera, Dermaptera, Dictyoptera, Mantodea, Diptera e Hymenoptrera) de la Sierra de los Organos, Pinar del Río (Arthropoda: Hexapoda). Cocuyo 12:6-10. (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); 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); Smith-Pardo, 2003Smith-Pardo, A.H. 2003. A preliminary account of the bees of Colombia (Hymenoptera: Apoidea): present knowledge and future directions. Journal of the Kansas Entomological Society 76 (2):335-341. (distribution); Genaro, 2004Genaro, J.A. 2004. Las abejas de la isla de la Juventud, Cuba (Hymenoptera: Apoidea). Boletín de la Sociedad Entomológica Aragonesa 34:177-179. (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); Rivero, 2006Rivero, A. 2006. Estudios de diversidad de insectos en la región Jibacoa-Hanabanilla. Macizo Guamuhaya. Centro Agrícola año 33 (no. 2. abr.-jun.):49-56. (distribution); Pascarella, 2006Pascarella, J.B. 2006. The bees of Florida. . (distribution); Genaro & Franz, 2008Genaro, J.A. & N. Franz 2008. The bees of Greater Puerto Rico (Hymenoptera: Apoidea: Anthophila). Insecta Mundi 40:1-21. (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); Ngo et al., 2013Ngo, H.T., J. Gibbs, T. Griswold & L. Packer 2013. Evaluating bee (Hymenoptera: Apoidea) diversity using Malaise traps in coffee landscapes of Costa Rica. The Canadian Entomologist 145:435-453. (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); Sagot et al., 2018Sagot, P, J. Mérida, R. Ayala & R. Vandame 2018. Situación actual del conocimiento de la fauna de abejas (Apoidea: Anthophila) del estado de Chiapas, México. In: (Ed.). Memorias X Congreso Mesoamericano sobre Abejas Nativas. 191-2011. (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 Poeyi Lepeletier, 1841:271, ♂. ♂, Île de Cuba (Musée de M. Serville); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:28, Type ('Musée de M. Serville'); Krombein, 1953Krombein, K.V. 1953. The wasps and bees of the Bimini Island Group, Bahamas, British West Indies (Hymenoptera: Aculeata). American Museum Novitates 1633:1-29.:20, Type (Serville collection). Synonymized with Halictus ligatus Say, 1837 by Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:27. - Cresson, 1865Cresson, E.T. 1865. On the Hymenoptera of Cuba. Proceedings of the Entomological Society of Philadelphia 4:200 pp. (distribution); Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7 (14):315-356.:322 ( listed as synonym of Halictus ligatus Say, 1837); Ashmead, 1900Ashmead, W.H. 1900. Report upon the aculeate Hymenoptera of the islands of St. Vincent and Grenada, with additions to the parasitic Hymenoptera and a list of the described Hymenoptera of the West Indies. Transactions of the Entomological Society of London pt. II:207-367. (distribution); Friese, 1902Friese, H. 1902. Beitrag zur Apidenfauna der grossen Antillen. Zeitschrift für systematische Hymenopterologie und Dipterologie 1-2:196-201. (distribution); Baker, 1906Baker, C.F. 1906. Halictinae de Cuba. First Ann. Rep. Agron. Stat. Cuba :253-274. (distribution); Krombein, 1953Krombein, K.V. 1953. The wasps and bees of the Bimini Island Group, Bahamas, British West Indies (Hymenoptera: Aculeata). American Museum Novitates 1633:1-29.:20 ( listed as synonym of Halictus ligatus Say, 1837); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:334 ( listed as synonym of Halictus ligatus Say, 1837); 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.:1955 ( listed as synonym of Halictus ligatus Say, 1837); Maes, 1993Maes, J.-M. 1993. Catalogo de los Apoidea (Hymenoptera) de Nicaragua. Revista Nicaraguense de Entomologia 26:11-30. ( listed as synonym of Halictus ligatus Say, 1837); Packer, 1999Packer, L. 1999. The distribution of Halictus ligatus Say and H. poeyi Lep. (Hymenoptera: Halictidae) in North America. In: Byers, G.W., R.H. Hagen & R.W. Brooks (Ed.). Entomological Contributions in Memory of Byron A. Alexander. 81-84. (distribution); Starr & Hook, 2003Starr, C.K. & Hook, A.W. 2003. The aculeate Hymenoptera of Trinidad, West Indies. Occasional Papers o the Department of Life Sciences, University of the West Indies 12:1-31. (distribution); Genaro, 2007Genaro, J.A. 2007. Las abejas (Hymenoptera: Apoidea: Anthophila) de la Hispaniola, Antillas. Boletín de la Sociedad Entomológica Aragonesa 40:247-254. (distribution); Genaro, 2008Genaro, J.A. 2008. Origins, composition and distribution of the bees of Cuba (Hymenoptera: Apoidea: Anthophila). Insecta Mundi 52:1-16. (distribution); Perez-Gelabert, 2008Perez-Gelabert, D.E. 2008. Arthropods of Hispaniola (Dominican Republic and Haiti): A checklist and bibliography. Zootaxa 1831:1-530. (distribution); Hall & Ascher, 2010Hall, H.G., & J.S. Ascher 2010. Surveys of bees (Hymenoptera: Apoidea: Anthophila) in natural areas of Alachua County in North-Central Florida. The Florida Entomologist 93 (4):609-629. (distribution); Hall & Ascher, 2011Hall, H.G., & J.S. Ascher 2011. Surveys of wild bees (Hymenoptera: Apoidea: Anthophila) in organic farms of Alachua County in north-central Florida. The Florida Entomologist 94 (3):539-552. (distribution); Perez-Gelabert, 2020Perez-Gelabert, D.E. 2020. Checklist, bibliography and quantitative data of the arthropods of Hispaniola. Zootaxa 4749:1-668. (distribution).
Halictus capitosus Smith, 1853:67, ♀. ♀, St. John's Bluff, East Florida (E. Doubleday, Esq.); Cockerell, 1905Cockerell, T.D.A. 1905. Notes on some bees in the British Museum. Transactions of the American Entomological Society 31:309-364.:351, Type ♀ (British Museum); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:28, Type (British Museum). Synonymized with Halictus ligatus Say, 1837 by Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:27. - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7 (14):315-356.:322 ( listed as synonym of Halictus ligatus Say, 1837); Cockerell, 1917Cockerell, W.P. 1917. Collecting bees in southern Texas. Journal of the New York Entomological Society 25:187-193. (distribution); Cockerell, 1919Cockerell, T.D.A. 1919. Some halictine bees in the United States national museum. Proceedings of the Entomological Society of Washington 20:177-182. (distribution); Sandhouse & Cockerell, 1924Sandhouse, G. & T.D.A. Cockerell 1924. Expedition of the California Academy of Sciences to the Gulf of California in 1921. The bees (III). Proceedings of the California Academy of Sciences ser. 4: v. 13 (21):333-339. (distribution); Cockerell, 1949Cockerell, T.D.A. 1949. Bees from Central America, principally Honduras. Proceedings of the United States National Museum 98 (No. 3233):429-490. (distribution); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:334 ( listed as synonym of Halictus ligatus Say, 1837); 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.:1955 ( listed as synonym of Halictus ligatus Say, 1837); Maes, 1993Maes, J.-M. 1993. Catalogo de los Apoidea (Hymenoptera) de Nicaragua. Revista Nicaraguense de Entomologia 26:11-30. ( listed as synonym of Halictus ligatus Say, 1837).
Halictus armaticeps Cresson, 1872:250, ♀. 8 ♀♀, Texas (leg. Belfrage, Boll); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:28, Type (Academy of Natural Sciences, Philadelphia). - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7 (14):315-356.:322 ( listed as synonym of Halictus ligatus Say, 1837); Cockerell, 1901Cockerell, T.D.A. 1901. Contributions from the New Mexico Biological Station. - X. Observations on bees collected at Las Vegas, New Mexico, and in the adjacent Mountains. II. The Annals and Magazine of Natural History ser. 7: v. 7:125-131. (distribution); Cockerell, 1901Cockerell, T.D.A. 1901. Flower and insect records from New Mexico. Entomological News 12 (2):38-43. (distribution); Cockerell, 1902Cockerell, T.D.A. 1902. Flowers and insects in New Mexico. American Naturalist 36 (430):809-817. (distribution); Cockerell, 1903Cockerell, T.D.A. 1903. A catalogue of the bees of California. Psyche 10:74-78. (distribution); Cockerell, 1906Cockerell, T.D.A. 1906. The bees of Florissant, Colorado. Bull. American Mus. Nat. Hist. 22:419-455. (distribution); Cockerell, 1906Cockerell, T.D.A. 1906. The bees of New Mexico. Transactions of the American Entomological Society 32:289-314. (distribution); Cockerell, 1907Cockerell, T.D.A. 1907. The bees of Boulder County, Colorado. University of Colorado Studies 4:239-259. (distribution); Cockerell, 1908Cockerell, T.D.A. 1908. Some bees of the genus Halictus. Proceedings of the Entomological Society of Washington 9:119-120. (distribution); Cockerell, 1911Cockerell, T.D.A. 1911. Records of bees. The Canadian Entomologist 43 (11):389-391. (distribution); Cockerell, 1914Cockerell, T.D.A. 1914. Bees visiting Helianthus. The Canadian Entomologist 46 (12):409-415. (distribution); Friese, 1916Friese, H. 1916. Zur Bienenfauna von Costa Rica. Stettiner Entomologische Zeitung 77:287-348. (distribution); Cockerell, 1916Cockerell, T.D.A. 1916. Sunflower insects in California and South Africa. The Canadian Entomologist 48:76-79. (distribution); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:27 ( listed as synonym of Halictus ligatus Say, 1837); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:334 ( listed as synonym of Halictus ligatus Say, 1837); 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.:1955 ( listed as synonym of Halictus ligatus Say, 1837); Maes, 1993Maes, J.-M. 1993. Catalogo de los Apoidea (Hymenoptera) de Nicaragua. Revista Nicaraguense de Entomologia 26:11-30. ( listed as synonym of Halictus ligatus Say, 1837).
Halictus texanus Cresson, 1872:251, ♂♀. 1 ♂, 1 ♀, Texas (G.W. Belfrage); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:28, not located. - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7 (14):315-356.:322 ( listed as synonym of Halictus ligatus Say, 1837); Cockerell, 1898Cockerell, T.D.A. 1898. On some Panurginae and other bees. Transactions of the American Entomological Society 25:185-198. (distribution); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:27 ( listed as synonym of Halictus ligatus Say, 1837); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:334 ( listed as synonym of Halictus ligatus Say, 1837); 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.:1955 ( listed as synonym of Halictus ligatus Say, 1837); Maes, 1993Maes, J.-M. 1993. Catalogo de los Apoidea (Hymenoptera) de Nicaragua. Revista Nicaraguense de Entomologia 26:11-30. ( listed as synonym of Halictus ligatus Say, 1837).
Halictus ornatipes Cresson, 1872:252, ♂. 4 ♂♂, Texas (leg. Belfrage, Boll); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:28, Type (Academy of Natural Sciences, Philadelphia). Synonymized with Halictus ligatus Say, 1837 by Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:27. - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:334 ( listed as synonym of Halictus ligatus Say, 1837); 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.:1955 ( listed as synonym of Halictus ligatus Say, 1837); Maes, 1993Maes, J.-M. 1993. Catalogo de los Apoidea (Hymenoptera) de Nicaragua. Revista Nicaraguense de Entomologia 26:11-30. ( listed as synonym of Halictus ligatus Say, 1837). - As Halictus ornaticeps: - Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7 (14):315-356.:322 ( listed as synonym of Halictus ligatus Say, 1837). - As Halictus ornaticeps: - Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7 (14):315-356.:322 ( listed as synonym of Halictus ligatus Say, 1837).
Halictus Townsendi Cockerell, 1896:293, ♀. ♀♀, San Rafael, March 8, and 23; Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:28, Type (U. S. National Museum). Synonymized with Halictus ligatus Say, 1837 by Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:27. - Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7 (14):315-356.:322 ( listed as synonym of Halictus ligatus Say, 1837); Cockerell, 1899Cockerell, T.D.A. 1899. Catálogo de las Abejas de Mexico. Biblioteca Agricola de las Secretaria de Fomento, Mexico, 1-20. (distribution); Cockerell, 1913Cockerell, T.D.A. 1913. Descriptions and records of bees. - XLVIII. The Annals and Magazine of Natural History ser. 8: v. 11 (61):54-65. (distribution); Cockerell, 1928Cockerell, T.D.A. 1928. Bees collected by Nathan Banks in the vicinity of the Panama Canal. Psyche 35:173-181. (distribution); Cockerell, 1932Cockerell, T.D.A. 1932. Bees (Hymenoptera, Apoidea) collected at Chichen Itzá, Yucatan, by the Harvard expeditions of 1929-1930. Bulletin of the Brooklyn Entomological Society 27:9-17. (distribution); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:334 ( listed as synonym of Halictus ligatus Say, 1837); 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.:1955 ( listed as synonym of Halictus ligatus Say, 1837); Maes, 1993Maes, J.-M. 1993. Catalogo de los Apoidea (Hymenoptera) de Nicaragua. Revista Nicaraguense de Entomologia 26:11-30. ( listed as synonym of Halictus ligatus Say, 1837). - As Halictus ligatus townsendi: - Cockerell, 1899Cockerell, T.D.A. 1899. Notes on american bees. The Entomologist 32:128-129. (distribution); Cockerell, 1949Cockerell, T.D.A. 1949. Bees from Central America, principally Honduras. Proceedings of the United States National Museum 98 (No. 3233):429-490. (distribution).