Papilio polyctor

Upperside dull black thickly irrorated (sprinkled) with golden-green scales Forewing: a broad subterminal golden-green band that varies in length, but in all specimens is more or less diffuse and obsolescent towards the costal margin; in specimens of the wet-season broods this band is slightly broader than in those of the dry season, also broader in the female than in the male.

Hindwing: the irroration of golden-green scales less dense, turning to blue on the anterior portions of the wing; a broad bright blue upper discal patch that stops well short of the termen, and has its outer margin uneven, occupies the base of interspace 4 and the outer portions of interspaces 5, 6, and 7; below, this patch is continued in interspaces 1 to 3 by much smaller diffuse quadrate spots of brilliant golden-green scales, that are prominent in wet-season forms, more obscure in the dry.

Underside chocolate brown, somewhat thinly irrorated with yellowish scales, which are absent however, from a more or less triangular patch in the middle of the forewing posteriorly, but coalesce and form an ill-defined very short subterminal band just above the tornal angle of that wing.

[2] Eastern Afghanistan, Pakistan, Kashmir, India (from Sikkim to Assam), Nepal, Bhutan, Myanmar, Thailand, northern Vietnam and Laos.

Head cleft, back strongly arched; "sides flattened out with a hard sharp ridge running longitudinally round the whole insect."