Epeolus pectoralis Robertson, 1897:345, ♀. 7 ♀♀, Carlinville, Illinois; Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:101, Lectotype ♀ (Illinois Natural History Survey, No. 15626). - As Doeringiella pectoralis: - Pascarella, 2006Pascarella, J.B. 2006. The bees of Florida. . (distribution). - As Triepeolus pectoralis: - Lovell & Cockerell, 1905Lovell, J.H. & Cockerell, T.D.A. 1905. The nomadine and epeoline bees of southern Maine. Psyche 12 (2):39-42. (distribution); Cockerell, 1921Cockerell, T.D.A. 1921. The epeoline bees of the American Museum Rocky Mountain expeditions. American Museum Novitates 23:1-16. (distribution); Cockerell & Sandhouse, 1924Cockerell, T.D.A. & G. Sandhouse 1924. Parasitic bees (Epeolinae and Melectinae) in the collection of the California Academy of Sciences. Proceedings of the California Academy of Sciences 13 (19):305-324. (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); Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170. (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).
Epeolus virginiensis Cockerell, 1907:137, ♂. ♂, Falls Church, Virginia, September 7th (leg. Nathan Banks); Brumley, 1965Brumley, R.L. 1965. A Revision of the Bee Genus Epeolus Latreille of Western America North of Mexico. M.S. thesis. Utah State University, Logan, Utah. iii + 92 pp.:73, Holotype (ANSP); Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:101, Holotype ♂ (U. S. National Museum of Natural History, No. 40107). - Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:101 ( listed as synonym of Triepeolus pectoralis (Robertson, 1897)).
Epeolus oswegoensis Mitchell, 1962:453, ♂. Holotype ♂, Oswego, N. Y., Aug. 26, 1936 (U.S.N.M., leg. K. V. Krombein); Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:101, Holotype ♂ (U. S. National Museum of Natural History, No. 75202). Synonymized with Triepeolus pectoralis (Robertson, 1897) by Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:101. - Mitchell, 1962Mitchell, T.B. 1962. Bees of the Eastern United States. Volume II. Technical bulletin (North Carolina Agricultural Experiment Station) 152:1-557. (distribution).