Sphinx vashti Strecker, 1878

Treated by Rothschild & Jordan, 1903, Novit. zool.9 (suppl.): 130, as a junior synonym of Sphinx vancouverensis. However, this latter taxon was shown to be a junior synonym of Sphinx perelegans by Hodges, 1971, in Dominick et al. Moths Am. N. of Mexico21: 60. Vashti also applies to the form with the grey thorax, which Rothschild & Jordan, 1903, Novit. zool.9 (suppl.): 131, suggested might be the spring form.