MORPHOLOGY
External characteristics
Male
Wingspan (mm): 70 (Braby, 2004); 74 (Feltwell, 1993).
The antennae are dorsally covered in greyish white scales (Yata & Morishita,1979).Forewings: The upper side wing surface is bright yellow coloured. Forewing underside is black, except for the cell end spot (Yata and Morishita, 1979). Hindwings Hindwing underside is black, except for the basal red area (Yata and Morishita, 1979).
Female Wingspan (mm):70 (Braby, 2004); 74 (Feltwell, 1993).
The females generally have a different underside wing surface than the males, by being darker with broader margins on both wings (D'Abrera, 1982). The upper side wing surface has wider black borders in females than in males, and there is sometimes an indication of submarginal series of yellow spots on the underside wing surface (Yata and Morishita, 1979).
Subspecies and variation
Six subspecies are described (Pequin, 2021).