Perdita obscurata Cresson, 1878:70, ♂♀. 1 ♂, 1 ♀, Georgia (leg. Morrison). - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Cockerell, 1896Cockerell, T.D.A. 1896. The bees of the genus Perdita F. Smith. Proceedings of the Academy of Natural Sciences of Philadelphia 48:25-107. (distribution); Timberlake, 1928Timberlake, P.H. 1928. Bees of the genus Perdita Smith in the American Museum of Natural History (Hymenoptera). American Museum Novitates 321:1-13. (distribution); Timberlake, 1952Timberlake, P.H. 1952. New records of Perdita from the eastern United States (Hymenoptera, Apoidea). Proceedings of the Entomological Society of Washington 54 (4):199-204. (distribution); Timberlake, 1958Timberlake, P.H. 1958. A revisional study of the bees of the genus Perdita F. Smith, with special reference to the fauna of the Pacific Coast (Hymenoptera, Apoidea). Part III. University Of California Publications In Entomology 14 (5):303-410. (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); 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, 2006Pascarella, J.B. 2006. The bees of Florida. . (distribution).
Perdita carolina Timberlake, 1952:199, ♂♀. Holotype ♀, Taylor's Bridge, Sampson County, North Carolina, May 24, 1951 (U. S. N. M., no. 61610, leg. T.B. Mitchell & H.K. Townes). Synonymized with Perdita obscurata Cresson, 1878 by Timberlake, 1960Timberlake, P.H. 1960. A revisional study of the bees of the genus Perdita F. Smith, with special reference to the fauna of the Pacific Coast (Hymenoptera, Apoidea). Part IV. University of California Publications In Entomology 17 (1):1-156.:134. Synonymized with Perdita obscurata Cresson, 1878 by Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:313. - 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.:1874 ( listed as synonym of Perdita obscurata Cresson, 1878).