Megatchile pugnàtus Say, 1837:408, ♂♀. ♂, ♀, Indiana.Megatchile pugnàtus Say, 1837:408, ♂♀. ♂, ♀, Indiana. - As Megachile pugnata: - Cresson, 1872Cresson, E.T. 1872. Hymenoptera Texana. Transactions of the American Entomological Society 4:153-292. (distribution); Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Robertson, 1897Robertson, C. 1897. North American bees - Descriptions and synonyms. Transactions of the Academy of Science of St. Louis 7 (14):315-356.:350 ( listed as synonym of Megachile inimica Cresson, 1872); Cockerell, 1898Cockerell, T.D.A. 1898. Some bees of the genus Megachile from New Mexico and Colorado. The Annals and Magazine of Natural History ser. 7: v. 1:125-130. (distribution); Cockerell, 1899Cockerell, T.D.A. 1899. Notes on american bees (Concluded from p. 129). The Entomologist 32:154-159. (distribution); Cockerell, 1900Cockerell, T.D.A. 1900. The New Mexico bees of the genus Megachile and a new Andrena. The Annals and Magazine of Natural History ser. 7: v. 6:7-20. (distribution); Cockerell, 1903Cockerell, T.D.A. 1903. A catalogue of the bees of California. Psyche 10:74-78. (distribution); Cockerell, 1906Cockerell, T.D.A. 1906. The bees of Florissant, Colorado. Bull. American Mus. Nat. Hist. 22:419-455. (distribution); Cockerell, 1906Cockerell, T.D.A. 1906. The bees of New Mexico. Transactions of the American Entomological Society 32:289-314. (distribution); Cockerell, 1907Cockerell, T.D.A. 1907. The bees of Boulder County, Colorado. University of Colorado Studies 4:239-259. (distribution); Cockerell, 1910Cockerell, T.D.A. 1910. Some bees from Eldora, Colorado. Psyche 17 (6):244-247. (distribution); Cockerell, 1911Cockerell, T.D.A. 1911. Some bees from western Canada. The Canadian Entomologist 43 (1):33-34. (distribution); Cockerell, 1912Cockerell, T.D.A. 1912. Descriptions and records of bees. - XLVII. The Annals and Magazine of Natural History ser. 8: v. 10 (59):484-494. (distribution); Cockerell, 1919Cockerell, T.D.A. 1919. The bees of Gold Hill, Colorado. The Canadian Entomologist 51:271-273. (distribution); Mitchell, 1937Mitchell, T.B. 1937. A revision of the genus Megachile in the Nearctic Region. Part VII. Taxonomy of the subgenus Sayapis (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 63 (2):175-206. (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); Mayer et al., 2000Mayer, D.F., E.R. Miliczky, B.F. Finnigan & C.A. Johansen 2000. The bee fauna (Hymenoptera: Apoidea) of southeastern Washington. Journal of the Entomological Society of British Columbia 97:25-32. (distribution); Wilson et al., 2010Wilson, J.S., L.E. Wilson, L.D. Loftis & T. Griswold 2010. The montane bee fauna of north central Washington, USA, with floral associations. Western North American Naturalist 70 (2):198-207. (distribution); Rios-Velasco et al., 2014Rios-Velasco, C., D.I. Barlanga-Reyes, R. Ayala-Barajas, M.Á. Salas-Marina, J.E. Ibarra-Rendón, P.B. Zamudio Flores, A. Roma-Chacón & C.H. Acosta-Muñiz 2014. Identification of Megachilid species (Hymenoptera: Megachilidae) and other pollinators in apple orchards in Chihuahua, México. The Florida Entomologist 97 (4):1829-1834. (distribution).