Steniolia duplicata Provancher, 1888:414, Gillaspy, 1964Gillaspy, J.E. 1964. A revisionary study of the genus Steniolia (Hymenoptera: Sphecidae: Bembicini). Transactions of the American Entomological Society 89 (1/2):1-117.:89, Lectotype ♂ (Laval University, Ste. Foy, Quebec). - Fox, 1893Fox, W.J. 1893. Report on some mexican Hymenoptera, principally from lower California. Proceedings of the California Academy of Sciences ser.2 (4):1-25. (distribution); Cockerell, 1898Cockerell, T.D.A. 1898. Contributions to the entomology of New Mexico. Proc. Davenport Acad. nat. Sci. 7:139-148. (distribution); Parker, 1917Parker, J.B. 1917. . 1-155. (distribution); Parker, 1929Parker, J.B. 1929. A generic revision of the fossoriel wasps of the tribes Stizini and Bembicini, with notes and descriptions of new species. Proceedings of the United States National Museum 75:1-203. (distribution); Gillaspy, 1964Gillaspy, J.E. 1964. A revisionary study of the genus Steniolia (Hymenoptera: Sphecidae: Bembicini). Transactions of the American Entomological Society 89 (1/2):1-117. (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); Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139. (distribution); 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).
Steniolia edwardsii Patton, 1894:45 Nomen nudum. Nomen nudum. Nomen nudum. - Parker, 1917Parker, J.B. 1917. . 1-155.:10 ( listed as synonym of Steniolia duplicata Provancher, 1888); Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139.:12 ( listed as synonym of Steniolia duplicata Provancher, 1888).Steniolia edwardsii Patton, 1894:45 Nomen nudum. Nomen nudum. Nomen nudum. - Parker, 1917Parker, J.B. 1917. . 1-155.:10 ( listed as synonym of Steniolia duplicata Provancher, 1888); Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139.:12 ( listed as synonym of Steniolia duplicata Provancher, 1888).
Steniolia meridionalis Fox, 1923:430, Gillaspy, 1964Gillaspy, J.E. 1964. A revisionary study of the genus Steniolia (Hymenoptera: Sphecidae: Bembicini). Transactions of the American Entomological Society 89 (1/2):1-117.:90, Holotype ♂ (CAS, no. 1326). - Parker, 1929Parker, J.B. 1929. A generic revision of the fossoriel wasps of the tribes Stizini and Bembicini, with notes and descriptions of new species. Proceedings of the United States National Museum 75:1-203.:51 ( listed as synonym of Steniolia duplicata Provancher, 1888); Gillaspy, 1964Gillaspy, J.E. 1964. A revisionary study of the genus Steniolia (Hymenoptera: Sphecidae: Bembicini). Transactions of the American Entomological Society 89 (1/2):1-117.:90 ( listed as synonym of Steniolia duplicata Provancher, 1888); 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.:1719 ( listed as synonym of Steniolia duplicata Provancher, 1888); Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139.:12 ( listed as synonym of Steniolia duplicata Provancher, 1888).