Amathusia masina, the rusty palmking, is a butterfly found in the Indomalayan realm It belongs to the Morphinae, a subfamily of the brush-footed butterflies.
Described as a new species of Amathusia characterised by the oval depression of the scent organ on the upper hindwing having an oval hair tuft near the base of space seven and a hair pencil. The ground colour is rich reddish brown and there are basal white stripes