Athyma ranga

Image based on museum specimen of Athyma ranga

Upperside: Male velvety black, female very dark brown, suffused with bluish in certain lights.[3]

Forewing: A medial anterior and a preapical larger whitish spot in cell; posteriorly in the cell, beyond its apex and below it at base of interspace 1, some dull obscure blue spots; a discal series of white spots, three elongate placed obliquely from just beyond middle of costa, two more inwards in interspaces 2 and 3, one in middle of interspaces 1 a and 1; the spot in interspace 2 very large truncate exteriorly, the spot in interspace 3 elongate. Beyond these spots an inner and an outer subterminal line of transverse white marks irrorated more or less with blackish scales.[3]

Hindwing: a subbasal broad transverse macular white band, the anterior spots that compose it more widely separated than the others, a postdiscal series of white spots, irrorated with black scales, and a subterminal line of short detached narrow transverse pale marks in the interspaces; cilia on forewings and hindwings black alternated with white.[3]

Underside very dark brown, shaded and blotched with black between the white markings; these latter as on the upperside, but all pure white, much larger, much more clearly defined; dorsal margin of hindwing broadly pale blue.[3]

Antennae, head, thorax and abdomen black; the thorax anteriorly obscurely glossed with blue; the abdomen with a series of lateral white spots on each side from base; body beneath white, glossed on thorax with pale blue; eyes hairy.[3][4]

The dry-season form has the ground colour above dark brown in both sexes and the markings broader and sullied white; on the underside the ground colour is distinctly ochraceous brown.[3]

Sikkim; Bhutan; hills of Assam, Burma and Tenasserim. Found also in southern India, Western Ghats and the Nilgiris.[3]

Blackvein sergeant puddling at Silent Valley National Park