Charaxes (Polyura) gamma is a butterfly in the family Nymphalidae. It was described by Percy Ireland Lathy in 1898. It is endemic to New Caledonia.
E. gamma Lathy, is the smallest Eriboea. Above blackish-brown with a short narrow cream-coloured median band and some indistinct, diffuse submarginal spots. Under surface with bands of vandyke-brown and blackish colour and shades. Only two males known, now in the British Museum. Patria probably New Caledonia or the New Hebrides.