Chlorion cyaneum Dahlbom, 1843:24 - Cameron, 1888-1900Cameron, P. 1888-1900. Biologia Centrali-Americana - Insecta. Hymenoptera. (Fossores) Vol. II. R. H. Porter and Dulau & Co., London. 413pp, 14 pl.:29 ( listed as synonym of Sphex caerulea Drury, 1773 = Linnaeus, 1758); Fernald, 1942Fernald, H.T. 1942. Annotated list of Florida Sphecinae (Hym., Sphecidae). Entomological News 53 (10):286-291. (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); Horta Vega et al., 2007Horta Vega, J.V., O.N. Pinson Domínguez, L. Barrientos Lozano & A. Correa Sandoval 2007. Sphecidae y Crabronidae (Hymenoptera) de algunos municipios del centro y sur de Tamaulipas, México. Acta Zool. Mex. (n.s.) 23:35-48. (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).
Sphex occultus Kohl, 1890:187 - Cockerell, 1898Cockerell, T.D.A. 1898. Contributions to the entomology of New Mexico. Proc. Davenport Acad. nat. Sci. 7:139-148. (distribution); Fernald, 1906Fernald, H.T. 1906. The digger wasps of North America and the West Indies belonging to the subfamily Chorioninae. Proceedings of the United States National Museum 31:291-423.:313 (comb. nov.); 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.:1576 ( listed as synonym of Chlorion cyaneum Dahlbom, 1843).