Epeolus helianthi Robertson, 1897:344, ♀. 5 ♀♀, Carlinville, Illinois. - As Triepeolus helianthi: - 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, 1919Cockerell, T.D.A. 1919. The bees of Peaceful Valley, Colorado. Journal of the New York Entomological Society 27:298-300. (distribution); Cockerell, 1921Cockerell, T.D.A. 1921. The epeoline bees of the American Museum Rocky Mountain expeditions. American Museum Novitates 23:1-16. (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).
Triepeolus helianthi arizonensis Cockerell, 1904:39, ♂. ♂, Phoenix, Arizona, October 9 (leg. Cockerell); Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:68, Holotype ♂ (U. S. National Museum of Natural History, No. 9707). Synonymized with Triepeolus helianthi (Robertson, 1897) by Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:68.
Triepeolus coquilletti Cockerell, 1905:106, ♀. Holotype ♀, San Bernardino County, California (leg. Coquillett); Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:68, Holotype ♀ (U. S. National Museum of Natural History, No. 9908). Synonymized with Triepeolus helianthi (Robertson, 1897) by Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:68. - Michener, 1947Michener, C.D. 1947. Bees of a limited area in southern Mississippi (Hymenoptera; Apoidea). The American Midland Naturalist 38 (2):443-455. (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).
Triepeolus helianthi pacificus Cockerell, 1919:300, ♂. Holotype ♂, Peaceful Valley, in the mountains of Boulder County, Colorado, Aug. 26. 1918 (leg. W.P. Cockerell); Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:68, Holotype ♂ (U. S. National Museum of Natural History, No. 100031). Synonymized with Triepeolus helianthi (Robertson, 1897) by Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:68.
Triepeolus maculiventris Cockerell, 1921:11, ♀. Holotype ♀, Colorado: Navajo Canyon in Mesa Verde National Park, about 6400 ft. alt, July 5, 1919; Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:68, Holotype ♀ (American Museum of Natural History, No. 25095). Synonymized with Triepeolus helianthi (Robertson, 1897) by Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:68.
Triepeolus lineatulus Cockerell & Sandhouse, 1924:306, ♂♀. Holotype ♀, Stockton, California, August 20, 1919 (Mus. Calif. Acad. Sci., No. 1598, leg. E.P. Van Duzee); Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:68, Holotype ♀ (California Academy of Sciences, No. 1598). Synonymized with Triepeolus helianthi (Robertson, 1897) by Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:68.