Sphex nitidiventris Spinola, 1851:53, ♀. 2 ♀♀, Para (leg. M. Ghiliani); 2 ♀♀, Colombie (leg. M. Reiche). - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (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); Santos et al., 2015Santos, E.F. dos, Y.C Grandinete & F.B. Noll 2015. Additions to the checklist of Scoliidae, Sphecidae, Pompilidae and Vespidae of Peru, with notes on the endemic status of some species (Hymenoptera, Aculeata). ZooKeys 519:33-48. (distribution).
Sphex beata Cameron, 1888:31, ♂♀.Mexico, Temax in North Yucatan (leg. Gaumer);Guatemala, Pantaleon 1700 feet (leg. Champion). - Cameron, 1888-1900Cameron, P. 1888-1900. Biologia Centrali-Americana - Insecta. Hymenoptera. (Fossores) Vol. II. R. H. Porter and Dulau & Co., London. 413pp, 14 pl.:31 (listed); 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.:75 ( listed as synonym of Sphex nitidiventris Spinola, 1851). - As Sphex beatus: - Kohl, 1890Kohl, F.F. 1890. Die Hymenopterengruppe der Sphecinen. I. Monographie der natürlichen Gattung Sphex Linné (sens. lat.). Annalen des Naturhistorischen Museums in Wien 5:77-194, 317-462. (distribution); Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution).
Sphex neotropicus Kohl, 1890:158 (key), 420, ♂♀.Rio grande do Sul (Mus. caes. Vindob., leg. Ihering). - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution); Schrottky, 1902Schrottky, C. 1902. Hyménoptères nouveaux de l'Amérique méridionale. . An. Mus. Buenos Aires 7:309-316. (distribution); Berland, 1929Berland, M.L. 1929. Les Sphegidae (Hyménoptères) du Muséum National de Paris. Bulletin du Muséum National d'Histoire Naturelle (Série 2) 1:309-312. (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.:75 ( listed as synonym of Sphex nitidiventris Spinola, 1851).