Halictus Zephyrus Smith, 1853:68, ♂. ♂, St. John's Bluff, East Florida (E. Doubleday, Esq.); Gardner & Gibbs, 2020Gardner, J. & J. Gibbs 2020. The 'red-tailed' Lasioglossum (Dialictus) (Hymenoptera: Halictidae) of the western Nearctic. European Journal of Taxonomy 725:1-242.:204, Holotype ♂ (NHMUK). - Robertson, 1895Robertson, C. 1895. Notes on bees, with descriptions of new species. Transactions of the American Entomological Society 22 (2):115-128. (distribution); Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution). - As Dialictus zephyrus: - Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538. (distribution), 431 (comb. nov.); 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). - As Lasioglossum zephyrus: - Gardner & Gibbs, 2020Gardner, J. & J. Gibbs 2020. The 'red-tailed' Lasioglossum (Dialictus) (Hymenoptera: Halictidae) of the western Nearctic. European Journal of Taxonomy 725:1-242. (distribution).
Halictus academicus Sandhouse, 1924:12, ♀. Holotype ♀, Boulder, Colorado, May 14 (U.S.N.M., No. 26402, leg. Irene Bleasdale); Gardner & Gibbs, 2020Gardner, J. & J. Gibbs 2020. The 'red-tailed' Lasioglossum (Dialictus) (Hymenoptera: Halictidae) of the western Nearctic. European Journal of Taxonomy 725:1-242.:204, Holotype ♀ (USNM). - Gardner & Gibbs, 2020Gardner, J. & J. Gibbs 2020. The 'red-tailed' Lasioglossum (Dialictus) (Hymenoptera: Halictidae) of the western Nearctic. European Journal of Taxonomy 725:1-242.:204 ( listed as synonym of Lasioglossum zephyrus (Smith, 1853)).
Halictus vintonensis Sandhouse, 1924:22, ♀. Holotype ♀, Vinton, Iowa, June 23, 1922 (U.S.N.M., No. 26417, leg. Sandhouse); Gardner & Gibbs, 2020Gardner, J. & J. Gibbs 2020. The 'red-tailed' Lasioglossum (Dialictus) (Hymenoptera: Halictidae) of the western Nearctic. European Journal of Taxonomy 725:1-242.:204, Holotype ♀ (USNM). - Gardner & Gibbs, 2020Gardner, J. & J. Gibbs 2020. The 'red-tailed' Lasioglossum (Dialictus) (Hymenoptera: Halictidae) of the western Nearctic. European Journal of Taxonomy 725:1-242.:204 ( listed as synonym of Lasioglossum zephyrus (Smith, 1853)).