Halictus fuscipennis Smith, 1853:67, ♂♀. ♂, ♀, St. John's Bluff, East Florida (E. Doubleday, Esq.), Lectotype ♀, examined (British Museum (BMNH)), designated by McGinley, 1986McGinley, R.J. 1986. Studies of Halictinae (Apoidea: Halicitidae), I. Revision of the New World Lasioglossum Curtis. Smithsonian Contributions to Zoology 429:1-294.:151. - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution). - As Lasioglossum fuscipenne: - Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538. (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); McGinley, 1986McGinley, R.J. 1986. Studies of Halictinae (Apoidea: Halicitidae), I. Revision of the New World Lasioglossum Curtis. Smithsonian Contributions to Zoology 429:1-294. (distribution); Pascarella, 2006Pascarella, J.B. 2006. The bees of Florida. . (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).
Halictus capitulatus Vachal, 1904:472, ♀. Holotype ♀, Teness., Mex. (coll. Sichel); McGinley, 1986McGinley, R.J. 1986. Studies of Halictinae (Apoidea: Halicitidae), I. Revision of the New World Lasioglossum Curtis. Smithsonian Contributions to Zoology 429:1-294.:151, Holotype ♀ (Paris Museum (MNHNP)); Rasmussen, 2012Rasmussen, C. 2012. Joseph Vachal (1838–1911): French entomologist and politician. Zootaxa 3442:1-52.:21, Holotype ♀ (MNHN). Synonymized with Lasioglossum fuscipenne (Smith, 1853) by Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:343. - 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.:1957 ( listed as synonym of Lasioglossum fuscipenne (Smith, 1853)); McGinley, 1986McGinley, R.J. 1986. Studies of Halictinae (Apoidea: Halicitidae), I. Revision of the New World Lasioglossum Curtis. Smithsonian Contributions to Zoology 429:1-294.:150 ( listed as synonym of Lasioglossum fuscipenne (Smith, 1853)); Rasmussen, 2012Rasmussen, C. 2012. Joseph Vachal (1838–1911): French entomologist and politician. Zootaxa 3442:1-52.:21 ( listed as synonym of Lasioglossum fuscipenne (Smith, 1853)). - As Lasioglossum capitulatus: