Charaxes (Polyura) epigenes is a butterfly in the family Nymphalidae. It was described by Frederick DuCane Godman and Osbert Salvin in 1888. It is endemic to the Solomon Islands.
E. epigenes Godm. and Salv. becomes interesting by the unlikeness of the sexes, as is never noticed in a similar way in the Eriboea, but only in Charaxes. Male above purple and with a blackish hue over it. Forewing with indistinct, yellowish submarginal and transcellular small streaks. Hindwing with a series of blue spots of the same appearance and distribution as in E. pyrrhus jupiter. Under surface reddish chestnut-brown. Female larger by more than half. Upper surface with a steep vertical whitish longitudinal band being repeated beneath, though softened down and darkened. Salomon Islands. Very rare. But few specimens discovered so far.