Xylophanes fassli
Diagnostic description:
Extremely similar to Xylophanes rothschildi. Forewing upperside very similar to Xylophanes rothschildi but discal spot larger; deeper olive-green shading at base absent; the darker green oval patch distal to the discal spot smaller (this patch is larger in Xylophanes rothschildi and Xylophanes blanca, and even smaller in Xylophanes bilineata); postmedian line arising beyond the middle of the inner margin, in the outer third; pink coloration of fringe of inner margin from base to postmedial line visible only on close examination or with the use of a magnifying glass.
Male genitalia: Similar to Xylophanes rothschildi but: Harpe shorter and more strongly curved upwards apically. Apical process of phallus broader and relatively straight.