Halictus vagabundus Vachal - Cockerell, 1899Cockerell, T.D.A. 1899. Catálogo de las Abejas de Mexico. Biblioteca Agricola de las Secretaria de Fomento, Mexico, 1-20.:5 ( listed as synonym of Halictus errans Ritsema, 1880).
Halictus Hesperus Smith, 1862:40, ♀. ♀, Panama; Cockerell, 1905Cockerell, T.D.A. 1905. Notes on some bees in the British Museum. Transactions of the American Entomological Society 31:309-364.:353, Type ♀ (British Museum). - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Michener, 1954Michener, C.D. 1954. Bees of Panamá. Bulletin of the American Museum of Natural History 104 (1):1-176. (distribution); Brothers, 1982Brothers, D.J. 1982. Two new species of Mutillidae associated with Halictus hesperus (Halictidae) in Panama (Hymenoptera). Sociobiology 7 (2):205-212. (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); 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); 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); Gonzalez et al., 2012Gonzalez, V.H., J.S. Ascher & M.S. Engel 2012. A new Stelis (Dolichostelis) from northern Colombia (Hymenoptera: Megachilidae): first records for South America and a synopsis of the bee fauna from the Caribbean region of Colombia. Journal of Natural History 46 (47-48):2919-2934. (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); 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); 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 vagans Smith, 1879:37, ♀. ♀, Mexico, Orizaba (British Museum); Cockerell, 1905Cockerell, T.D.A. 1905. Notes on some bees in the British Museum. Transactions of the American Entomological Society 31:309-364.:353, Type ♀ (British Museum); Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:33, Type (British Museum of Natural History). Synonymized with Halictus agilis Smith, 1879 by Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:32. - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643.:61 ( listed as synonym of Halictus errans Ritsema, 1880); Cockerell, 1899Cockerell, T.D.A. 1899. Catálogo de las Abejas de Mexico. Biblioteca Agricola de las Secretaria de Fomento, Mexico, 1-20.:5 ( listed as synonym of Halictus errans Ritsema, 1880); Michener, 1954Michener, C.D. 1954. Bees of Panamá. Bulletin of the American Museum of Natural History 104 (1):1-176.:39 ( listed as synonym of Halictus hesperus Smith, 1862).
Halictus errans Ritsema, 1880:xcvii Synonymized with Halictus agilis Smith, 1879 by Sandhouse, 1941Sandhouse, G.A. 1941. The american bees of the subgenus Halictus. Entomologica Americana 21:23-38 + 1 pl.:32. - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Cockerell, 1899Cockerell, T.D.A. 1899. Catálogo de las Abejas de Mexico. Biblioteca Agricola de las Secretaria de Fomento, Mexico, 1-20. (distribution); Michener, 1954Michener, C.D. 1954. Bees of Panamá. Bulletin of the American Museum of Natural History 104 (1):1-176.:39 ( listed as synonym of Halictus hesperus Smith, 1862).
Halictus schmidti Friese, 1921:78, 84, ♂♀. ♂♂, ♀♀, San José de Costa Rica (leg. Schmidt). Synonymized with Halictus hesperus Smith, 1862 by Michener, 1954Michener, C.D. 1954. Bees of Panamá. Bulletin of the American Museum of Natural History 104 (1):1-176.:39.
Halictus hondurasicus Cockerell, 1949:443, ♀. Holotype ♀, Honduras: Zamorano, January 27 (U.S.N.M., No. 58482, leg. Adan Rivera). Synonymized with Halictus hesperus Smith, 1862 by Michener, 1954Michener, C.D. 1954. Bees of Panamá. Bulletin of the American Museum of Natural History 104 (1):1-176.:39.
Halictus pseudovagans Cockerell, 1949:444, ♀. Holotype ♀, Honduras: Zamorano, October 16 (U.S.N.M., No. 58483, leg. Cisneros). Synonymized with Halictus hesperus Smith, 1862 by Michener, 1954Michener, C.D. 1954. Bees of Panamá. Bulletin of the American Museum of Natural History 104 (1):1-176.:39.