Byasa latreillei

Byasa latreillei, the rose windmill, is a butterfly from the windmills genus ("Byasa"), found in various parts of Asia, comprising tailed black swallowtail butterflies with white spots and red submarginal crescents.
Description.
Male upperside dull brownish black. Forewing with streaks in cell, the internervular streaks and the veins velvety black. Hindwing: ground colour more uniform to apex of cell, beyond this interspaces 2, 3 and 4 with broad elongate white spots, the spot in interspace 2 slightly tinged outwardly with crimson; sometimes a white crimson-tinted spot also in interspace 1; a subterminal series of crimson lunules in interspaces 2 to 5, that in 5 generally more or less white; lastly, a crimson spot at apex of vein 3 and on apex of tail. Underside similar, ground colour much paler; markings of the hindwing as on the upperside, but slightly larger, the crimson spots brighter; in many specimens a small discal adnervular spot in interspace 5, and a sub-terminal small white lunule in interspace 6 also present; the crimson-tinted discal spot in interspace 1 always present. Antennae dark brownish black, head and front of the prothorax crimson, the rest of the body above black; beneath, the palpi, thorax and abdomen crimson, the middle of the thorax and of the abdomen with black markings.
Female similar, slightly paler; the white and crimson markings on the hindwing on both upper and undersides similar but larger; there is generally also a discal adnervular spot in interspace 5. Antennae, head, thorax and abdomen as in the male.
Range.
Afghanistan, Pakistan, northern India, Nepal, Bhutan, northern Myanmar, southern China and northern Vietnam.
In India, it is found in the states of Uttarakhand, Sikkim, Assam, Meghalaya, Nagaland and Manipur.
Status.
It is not rare and not regarded as threatened. Subspecies "A. l. kabrua" is protected by law in India. Requires more information.
Taxonomy.
Three subspecies are described of which the following two occur in India: 
Etymology.
The specific epithet honours the French entomologist Pierre André Latreille.