Halictus splendens Lepeletier, 1841:283, ♀. ♀, Caroline, Amérique septentrionale (Musée de M. Serville); Sandhouse, 1936Sandhouse, G.A. 1936. The bees of the genus Agapostemon (Hymenoptera: Apoidea) occuring in the United States. Jour. Washington Acad. Sci. 26 (2):70-83.:79, Type ♀, present location of the type is unknown to the writer; Roberts, 1972Roberts, R.B. 1972. Revision of the bee genus Agapostemon (Hymenoptera: Halictidae). The University of Kansas Science Bulletin 49 (9):437-590.:529, Type ♀ (Muséum National D'Histoire Naturelle, Paris). - As Agapostemon splendens: - Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7:315-356. (distribution); Cockerell, 1914Cockerell, T.D.A. 1914. Descriptions and records of bees.-LXIII. Annals and Magazine of Natural History ser. 8 (14):361-369. (distribution); Sandhouse, 1936Sandhouse, G.A. 1936. The bees of the genus Agapostemon (Hymenoptera: Apoidea) occuring in the United States. Jour. Washington Acad. Sci. 26 (2):70-83. (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); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538. (distribution); Roberts, 1972Roberts, R.B. 1972. Revision of the bee genus Agapostemon (Hymenoptera: Halictidae). The University of Kansas Science Bulletin 49 (9):437-590. (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); 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); Pascarella, 2006Pascarella, J.B. 2006. The bees of Florida. . (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); Ramírez-Freire et al., 2012Ramírez-Freire, L., Alanís-Flores, G. J., Ayala-Barajas, R., Quiroz-Martínez, H. & Velazco Macías, C. G. 2012. Las abejas del género Agapostemon (Hymenoptera: Halictidae) del estado de Nuevo León, México. Revista Mexicana de Biodiversidad 83:63-72. (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).
Agapostemon æruginosus Smith, 1853:86, ♀.St. John's Bluff, East Florida (E. Doubleday, Esq.); Roberts, 1972Roberts, R.B. 1972. Revision of the bee genus Agapostemon (Hymenoptera: Halictidae). The University of Kansas Science Bulletin 49 (9):437-590.:529, Type ♀ (British Museum (Natural History)). - Cresson, 1872Cresson, E.T. 1872. Hymenoptera Texana. Transactions of the American Entomological Society 4:153-292. (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 7:315-356.:328 ( listed as synonym of Agapostemon splendens (Lepeletier, 1841)); Sandhouse, 1936Sandhouse, G.A. 1936. The bees of the genus Agapostemon (Hymenoptera: Apoidea) occuring in the United States. Jour. Washington Acad. Sci. 26 (2):70-83.:79 ( listed as synonym of Agapostemon splendens (Lepeletier, 1841)); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:452 ( listed as synonym of Agapostemon splendens (Lepeletier, 1841)); Roberts, 1972Roberts, R.B. 1972. Revision of the bee genus Agapostemon (Hymenoptera: Halictidae). The University of Kansas Science Bulletin 49 (9):437-590.:529 ( listed as synonym of Agapostemon splendens (Lepeletier, 1841)); 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.:1953 ( listed as synonym of Agapostemon splendens (Lepeletier, 1841)); Ramírez-Freire et al., 2012Ramírez-Freire, L., Alanís-Flores, G. J., Ayala-Barajas, R., Quiroz-Martínez, H. & Velazco Macías, C. G. 2012. Las abejas del género Agapostemon (Hymenoptera: Halictidae) del estado de Nuevo León, México. Revista Mexicana de Biodiversidad 83:63-72.:71 ( listed as synonym of Agapostemon splendens (Lepeletier, 1841)). - As Temnosoma aeruginosum: - Bodkin, 1918Bodkin, G.E. 1918. Notes on some British Guiana Hymenoptera (exclusive of the Formicidae). The Transactions of the Entomological Society of London 1917:297-321, pls. XXI-XXIII. (distribution).
Agapostemon nigricornis Robertson, 1893:147 - Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7:315-356.:329 ( listed as synonym of Agapostemon splendens (Lepeletier, 1841)); Sandhouse, 1936Sandhouse, G.A. 1936. The bees of the genus Agapostemon (Hymenoptera: Apoidea) occuring in the United States. Jour. Washington Acad. Sci. 26 (2):70-83.:79 ( listed as synonym of Agapostemon splendens (Lepeletier, 1841)).