Calliopsis maculatus Smith, 1853:129, ♀. ♀, East Florida (F. Smith, leg. 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.:321, Type ♀ (British Museum). - Cresson, 1879Cresson, E.T. 1879. Catalogue of North American Apidae. Transactions of the American Entomological Society and Proceedings of the Entomological Section of the Academy of Natural Sciences 7:215-232. (distribution). - As Acamptopoeum maculatum: - Shinn, 1967Shinn, A.F. 1967. A revision of the bee genus Calliopsis and the biology and ecology of C. andreniformis (Hymenoptera, Andrenidae). The University of Kansas Science Bulletin 46 (21):753-936. (distribution), 893 (comb. nov.). - As Calliopsis maculata: - 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.:293 (taxonomy [No specimens other than the type are known of this species. It has been examined by Padre J. S. Moure, at the request of A. F. Shinn, and they are of the opinion that it is a South American species, probably in the genus Acamptopoeum. Possibly it was mislabelled, and thus both its identity and distribution are in doubt.]).