Chelostoma rugifrons Smith, 1854:220, ♀. xw, Georgia (B.M.); Mitchell, 1937Mitchell, T.B. 1937. A revision of the genus Megachile in the Nearctic Region. Part VIII. Taxonomy of the subgenus Chelostomoides, Addenda and Index (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 63 (4):381-421.:414, Type ♀ (Brit. Mus.); Raw, 2002Raw, A. 2002. New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae). Zootaxa 71:1-43.:8, Type ♀ (BMNH, 17a2475). - As Chalicodoma rugifrons: - 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); Snelling, 1990Snelling, R.R. 1990. A review of the native North American bees of the genus Chalicodoma (Hymenoptera: Megachilidae). Contributions in Science, Natural History Museum Los Angeles County 421:1-39. (distribution). - As Chelostomoides rugifrons: - Cockerell, 1904Cockerell, T.D.A. 1904. Notes on some bees in the British Museum. The Canadian Entomologist 36:301-304.:301 (comb. nov.). - As Megachile rugifrons: - Mitchell, 1937Mitchell, T.B. 1937. A revision of the genus Megachile in the Nearctic Region. Part VIII. Taxonomy of the subgenus Chelostomoides, Addenda and Index (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 63 (4):381-421. (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); Raw, 2002Raw, A. 2002. New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae). Zootaxa 71:1-43. (distribution); Pascarella, 2006Pascarella, J.B. 2006. The bees of Florida. . (distribution); Owens et al., 2018Owens, B.E., L. Allain, E.C. van Gorder, J.L. Bossart & C.E. Carlton 2018. The bees (Hymenoptera: Apoidea) of Louisiana: An updated, annotated checklist. Proceedings of the Entomological Society of Washington 120 (2):272-307. (distribution).
Megachile rufimanus Robertson, 1891:65, ♂♀. 5 ♀♀, 11 ♂♂, Carlinville, Ill., June 26th to July 19th (leg. Robertson). - Mitchell, 1937Mitchell, T.B. 1937. A revision of the genus Megachile in the Nearctic Region. Part VIII. Taxonomy of the subgenus Chelostomoides, Addenda and Index (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 63 (4):381-421.:412 ( listed as synonym of Megachile rugifrons (Smith, 1854)); 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.:2075 ( listed as synonym of Chalicodoma rugifrons (Smith, 1854)); Snelling, 1990Snelling, R.R. 1990. A review of the native North American bees of the genus Chalicodoma (Hymenoptera: Megachilidae). Contributions in Science, Natural History Museum Los Angeles County 421:1-39.:31 ( listed as synonym of Chalicodoma rugifrons (Smith, 1854)); Raw, 2002Raw, A. 2002. New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae). Zootaxa 71:1-43. (distribution), 7 ( listed as synonym of Megachile rugifrons (Smith, 1854)), 8 ( listed as synonym of Megachile rugifrons (Smith, 1854)). - As Megachile rugimanus: - Mitchell, 1962Mitchell, T.B. 1962. Bees of the Eastern United States. Volume II. Technical bulletin (North Carolina Agricultural Experiment Station) 152:1-557.:187 ( listed as synonym of Megachile rugifrons (Smith, 1854)). - As Megachile rugimanus: - Mitchell, 1962Mitchell, T.B. 1962. Bees of the Eastern United States. Volume II. Technical bulletin (North Carolina Agricultural Experiment Station) 152:1-557.:187 ( listed as synonym of Megachile rugifrons (Smith, 1854)).