Perdita xanthismae Cockerell, 1905:331, ♀. ♀, Goldthwaite, Texas, September 4, 1905 (leg. J.C. Crawford). - 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). - As Perdita xanthisma: - Timberlake, 1968Timberlake, P.H. 1968. 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 VII. University of California Publications In Entomology 49:1-196. (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).
Perdita xanthismae sideranthi Cockerell, 1906:178, ♀. 2 ♀♀, Handley, Texas, Aug. 3rd, 1905 (leg. J.C. Crawford); 7 ♀♀, Ennis, Texas, Sept. 27th, 1905 (leg. F.C. Bishopp). - 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.:1885 ( listed as synonym of Perdita xanthisma Cockerell, 1905).