Lexias pardalis has a wingspan reaching about 80–90 millimetres (3.1–3.5 in). It exhibits a strong sexual dimorphism, with very different pattern and colour. The upperside of the wings of the male are black with shimmering greenish blue margins, especially in the hind wings. The uppersides of the cryptic wings of the larger females are dark brown with several rows of yellow spots, a pale green pattern on the lower wings. The wing pattern of yellow spots continue across the thorax and the abdomen.
The undersides in the males are brownish with whitish spots, while in the female the forewings are dark brown and the hindwings are pale bluish green, with whitish spots in both wings. The apical portion of the antennae are yellow-orange in both sexes. Adults mainly feed on rotting fruits, especially Garcinia [mangosteens], but also on nectar of flowers.
This species can be found in the Indomalaya ecozone.