Promenesta autampyx is a moth in the Depressariidae family. It was described by Meyrick in 1925. It is found in Peru, Paraguay and Brazil. The wingspan is 13-14 mm. The forewings are light yellow, with the costal edge orange-yellow and sometimes a grey transverse mark on the end of the cell. There is a moderate terminal fascia of light violet-grey suffusion extending around the apex and tornus, and the terminal edge is deep fulvous. The hindwings are rather dark grey.