Butterflies in the genus Mycalesis, the Bush Browns, are common in the warm regions from Central Asia to Australia.
Predominantly brown in colour, all the species of the Bush Browns have submarginal ocelli (eyespots) on the underside of both the fore and hindwings.
Their flight is generally weak but they are alert and skittish, and are often quite challenging to photograph. 
The Bush Browns typically rest with their wings folded upright.
They are notably polymorphic, with wet- and dry-season forms differing in many species, especially as regards size and number of underwing eyespots.
While the ocelli in the wet-season forms are usually well defined and clearly visible, the ocelli in the dry-season forms are usually faded and small.

The Pachmarhi Bush Brown (Mycalesis perseoides) looks very similar to the Dark-brand Bush Brown (Mycalesis mineus).
The male Mycalesis perseoides differs, however, from Mycalesis mineus by the sex-mark on the underside of the forewing, which is longer, broader, and is ochraceous brown, and not black in colour.

Ben Tre area, Mekong Delta, Vietnam, 24 December 2023