Triepeolus Townsendi Cockerell, 1907:63, ♂♀. ♀, Rociada, New Mexico, Aug. 8 (leg. Cockerell); ♂, Rio Ruidoso, New Mexico, about 6700 ft., July 27 (leg. C.H.T. Townsend); Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:123, Holotype ♂ (U. S. National Museum of Natural History, No. 100039). - Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170. (distribution).
Triepeolus concinnus Cockerell, 1917:300, ♀. ♀, Meadow Valley, Mexico (U.S. Nat. Museum, leg. C.H.T. Townsend); Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:123, Holotype ♀ (U. S. National Museum of Natural History, No. 22894). Synonymized with Triepeolus townsendi Cockerell, 1907 by Rightmyer, 2008Rightmyer, M.G. 2008. A review of the cleptoparasitic bee genus Triepeolus (Hymenoptera: Apidae).-Part I. Zootaxa 1710:1-170.:123. - As Deringiella concinnus: - Nava-Bolaños & Osorio-Olvera, 2022Nava-Bolaños, A. & L. Osorio-Olvera 2022. Estado del arte del conocimiento de biodiversidad de los polinizadores de México. Revista Mexicana de Biodiversidad 93:1-77. (distribution).