Megachile integra Cresson, 1878:121, ♂. 2 ♂♂, Texas (leg. Heiligbrodt); Mitchell, 1936Mitchell, T.B. 1936. A revision of the genus Megachile in the Nearctic Region. Part V. Taxonomy of subgenus Xeromegachile (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 62 (4):323-382.:343, Type ♂ (A.N.S.P., no. 2463). - 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); Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Mitchell, 1936Mitchell, T.B. 1936. A revision of the genus Megachile in the Nearctic Region. Part V. Taxonomy of subgenus Xeromegachile (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 62 (4):323-382. (distribution); Mitchell, 1962Mitchell, T.B. 1962. Bees of the Eastern United States. Volume II. Technical bulletin (North Carolina Agricultural Experiment Station) 152:1-557. (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).
Megachile strophostylis Robertson, 1904:277 - Mitchell, 1936Mitchell, T.B. 1936. A revision of the genus Megachile in the Nearctic Region. Part V. Taxonomy of subgenus Xeromegachile (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 62 (4):323-382.:341 ( listed as synonym of Megachile integra Cresson, 1878); Mitchell, 1962Mitchell, T.B. 1962. Bees of the Eastern United States. Volume II. Technical bulletin (North Carolina Agricultural Experiment Station) 152:1-557.:148 ( listed as synonym of Megachile integra Cresson, 1878); 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.:2064 ( listed as synonym of Megachile integra Cresson, 1878).