Colletes simulans armatus Patton, 1879:143, Neolectotype ♀ (United States National Museum), designated by Stephen, 1954Stephen, W.P. 1954. A revision of the bee genus Colletes in America north of Mexico (Hymenoptera, Colletidae). University of Kansas Science Bulletin 36:149-527.:241. - Michener, 1947Michener, C.D. 1947. Bees of a limited area in southern Mississippi (Hymenoptera; Apoidea). The American Midland Naturalist 38 (2):443-455. (distribution); Stephen, 1954Stephen, W.P. 1954. A revision of the bee genus Colletes in America north of Mexico (Hymenoptera, Colletidae). University of Kansas Science Bulletin 36:149-527. (distribution); Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538.:48 ( listed as synonym of Colletes simulans miamiensis Mitchell, 1951); 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).
Colletes scitula Patton, 1879:143 - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Stephen, 1954Stephen, W.P. 1954. A revision of the bee genus Colletes in America north of Mexico (Hymenoptera, Colletidae). University of Kansas Science Bulletin 36:149-527.:240 ( listed as synonym of Colletes simulans armatus Patton, 1879).
Colletes spinosa Robertson, 1891:60, ♂♀. 5 ♀♀, 14 ♂♂, Carlinville, Ill., August 30th to October 7th (leg. Robertson), Lectotype ♀ (Illinois Natural History Survey, 9697), designated by Stephen, 1954Stephen, W.P. 1954. A revision of the bee genus Colletes in America north of Mexico (Hymenoptera, Colletidae). University of Kansas Science Bulletin 36:149-527.:241. - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Stephen, 1954Stephen, W.P. 1954. A revision of the bee genus Colletes in America north of Mexico (Hymenoptera, Colletidae). University of Kansas Science Bulletin 36:149-527.:240 ( listed as synonym of Colletes simulans armatus Patton, 1879).
Colletes kudonis Cockerell, 1927:16, ♂. Holotype ♂, North Japan, 1910 (American Museum); Kuhlmann & Ascher, 2010Kuhlmann, M. & J.S. Ascher 2010. Two new synonymies of eastern North American Colletes Latr. species described from Japan (Hymenoptera: Colletidae). Entomological News 121 (4):325-328.:325, Holotype ♂ (AMNH). Synonymized with Colletes simulans armatus Patton, 1879 by Kuhlmann & Ascher, 2010Kuhlmann, M. & J.S. Ascher 2010. Two new synonymies of eastern North American Colletes Latr. species described from Japan (Hymenoptera: Colletidae). Entomological News 121 (4):325-328.:325.