Baltia butleri

It closely resembles Pontia shawii, from which it differs as follows: The male has the upperside ground colour as in P. shawii. Forewing has the black markings also more or less similar but altogether smaller and narrower, the terminal series of spots reduced to three or four. Hindwing is similar, but there are two conspicuous black spots on the discocellulars. Underside of the forewing has the ground colour white, veins dusky, costa narrowly and apex suffused with pinkish ochraceous; the discocellular black spot as on the upperside; veins, 4, 5, 6, and apical portion of 7 broadly bordered on each side with black scales that run parallel to but do not touch the veins. Hindwing: ground colour pinkish ochraceous, the veins conspicuously white; all of them, except a small portion in the middle of the discocellulars, bordered, in the manner similar to the veins at the apex of the forewing, with broad lines of black scales on each side. The female has the upperside similar to the upperside of the female P. shawii, but the wings are irrorated (sprinkled) with black scales only at their bases; the black markings on the forewing are altogether smaller and narrower, and the black curved, outwardly dentate, discal band becomes diffuse and ill-defined posteriorly. …

Found in Ladakh, the Digha pass; 15,000 feet (4,600 m) in Leh; Kardong Pass in the Karakoram and other areas at an altitude of 15,000 to 18,000 feet (4,600 to 5,500 m).

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