MORPHOLOGY
External characteristics
Male
Forewing length (mm): 49 - 62 (Jonko, 2021). Wingspan (mm): 65 (Feltwell, 1993), 63 - 68 (Kirby and Bowdler Sharpe, 1897).
The body and antennae are white on the underside and black on the upper side (Kirby & Bowdler Sharpe, 1897).Forewings: The upper side wing surface is white, with a black coloured triangular patch at the tip of the forewing and the fringes are yellowish. The underside wing surface is yellow (Kirby and Bowdler Sharpe, 1897). Hindwings The hindwing has a large stop on the costa towards the tip. The hindwing underside is sprinkled with black scales (Kirby and Bowdler Sharpe, 1897).
Female
Forewing length (mm): 51 - 63 (Jonko, 2021). Wingspan (mm):65 (Feltwell, 1993), 63 - 68 (Kirby and Bowdler Sharpe, 1897).
The forewing has more spots in the female and she is larger than the male (Feltwell, 1993).
Subspecies and variation
Nine subspecies are described (Jonko, 2021).