Type species: Sphinx strigilis Linnaeus, 1771, by subsequent designation by Fletcher & Nye, 1982, in Nye, Generic Names Moths of the World 4: 133.
A junior homonym of Ambulyx Westwood, 1847 (Lepidoptera: Sphingidae) and an objective synonym of Protambulyx.
Ambulyx was a Boisduval manuscript name that was made available by Burmeister. Boisduval, 1870, Considérations Lépid. Guatemala: 68, incorrectly attributed the authorship of Ambulyx Burmeister, 1855 to himself.