Bassarona durga
Bassarona durga, the blue duke, is a species of nymphalid butterfly found in the Himalayas.
Description
Euthalia durga resembles Euthalia duda, but is much rarer; on the forewing the white median band is broader, the subapical spots smaller, on the hindwing the median area steeper and distally dentate. Under surfacechiefly blue instead of yellowish-green, the distal portion of both wings nearly grey-black.