Synonymized with Celerio euphorbiae as a subspecies by Rothschild & Jordan, 1903, Novit. zool.9 (suppl.): 716. Reinstated as a species and transferred to Hyles by Pittaway, 1983, Entomologist's Gaz.34: 78. ReSynonymized with Hyles euphorbiae as a subspecies by Speidel & Hassler, 1989, Nachr. entomol. Ver. Apollo8: 49. Reinstated as a species by Pittaway, 1993, The hawkmoths of the Western Palaearctic: 139. Implicitly treated as a subspecies of Hyles euphorbiae by Meerman, 1993, Entomologist's Gaz.44: 206. Implicitly reinstated as a species by Danner, Eitschberger & Surholt, 1998, Herbipoliana4 (1): 242.