Mimathyma chevana

Mimathyma chevana, the sergeant emperor, is an Indomalayan butterfly of the family Nymphalidae. The species was first described by Frederic Moore in 1865.
There are two subspecies:

M. c. chevana Sikkim, Assam, northern Myanmar
M. c. leechii Moore, western and central China

Mimathyma chevana mimics Athyma opalina.