Ambulyx sericeipennis
Diagnostic description:
Habitus: Similar to Ambulyx maculifera but greyer and the submarginal band of the forewing upperside extends to the costal and anal margins, whereas it fades before meeting the anal margin in Ambulyx maculifera.
Male genitalia: Tergum A8 weakly bi-sinuate. Gnathos lobed mesally, with lobe rather narrow and almost truncate. Harpe with a long finger-like process that points ventrad; mesal ridge composed of two lamellae, irregularly dentate an distally produced into a cone, the extreme end of which is turned ventrad. Phallus as in Ambulyx maculifera, with row of teeth dorsally and with some irregular teeth ventrally; vesica with club-shaped cornutus.
Female genitalia: Sterigma with mesal lobe longer and broader than in Ambulyx maculifera.