Tragelaphus hippelaphus, Ogilby, P. Z. S. 1836, p. 138; Rüpp. Verz. Senck. Mus. iii. pt. 2, p. 181 (1839).
Nyl-ghau, Wm. Hunter, Phil. Trans. lxi. p. 170 (1771).
White-footed Antelope, Penn. Syn. p. 29, pl. vi. (1771); id. Quadr. i. p. 74, pl. vii. (1781); id. op. cit. ed. 3, p. 83, pl. xiii. (1793).
Vernacular Names:—Nil, Nilgao (♂), Nilgai (♀); Roz Rojh, Rojra in Hindustani; Rú-i in Dakhani, Mahratti, and Guzrati; Guraya, Gond; Murim (♂), Susam (♀), in Ho Kal; Mánú-potú in Tamil; Mairu Maravi, Kard-Kadrai, Canarese (Blanford).
Male. About four feet six inches in height at the withers. General colour of the head iron-grey, due to the hairs being black at the base and white at the extremities; nose, neck, and cheeks tinted with black; whitish grey above the eye; two small white cheek-spots generally traceable. Lips and chin white; a large white patch at the upper extremity of the throat; inter-ramal area also white. Ears greyish white, blacker behind towards the extremities, and furnished with two black spots on the outer edge in front. Upper parts of the body iron-grey, like the head; lower portion, chest, and belly black, except a median ventral white streak; groin, inner side of thighs above, and subcaudal area of rump pure white, the latter emphasized on each side by a black vertical streak on the buttocks. Tail white below and at the sides, grey above; tuft white at the base, black at the tip. Fore and hind limbs black inside and outside, except for two large white spots on the front and outer sides of the pasterns and on the outer and inner sides of the fetlocks; fetlock-spot of hind leg sometimes extending right round the front to form a complete half-ring; the corresponding spots on the fore legs much smaller, the outer obsolete. A long tuft of black hair on the throat below the white patch; a short hog-mane on the nape formed of stiff hairs, whitish at the base, blackish at the ends; parting of hair on the withers; behind this point a spinal mane of longish black hairs extends to nearly the middle of the back and is represented as far as the root of the tail by a narrow stripe of short black hairs.
Female. Without horns. Smaller and slighter than the male and of a fawn or tawny hue throughout, but with the same white patches and markings as in the male, the fetlock and pastern spots being very conspicuous and set off with black. A short hog-mane on the nape, but no tuft on the throat.
Young male. Like the female in colour.
Measurements of an adult male skull:—Basal length 16·3 inches, greatest breadth 5·75, muzzle to orbit 10, horn 8·5.
Horns usually from 8 to 9 inches long, with a basal girth of about 8 inches, and rarely reaching a length of 11·75 inches, with a basal girth of 9·5.
Hab. The Peninsula of India from the base of the Himalayas to the south of Mysore; North-west Provinces, Eastern Punjab, Guzerat, and the Konkan; but not extending to the Indus on the west, nor into Eastern Bengal, nor into Malabar. Entirely absent from the countries to the east of the Bay of Bengal.