Xylophanes aristor is a moth of the family Sphingidae. It is known from Guatemala to Venezuela, Ecuador and probably Colombia. The forewing upperside ground colour and the upperside of the body is olive-green and the forewing underside is orange. It is similar to Xylophanes crotonis and Xylophanes kiefferi. Adults are probably on wing year round. The larvae probably feed on Psychotria panamensis, Psychotria nervosa and Pavonia guanacastensis.