Tetraogallus Gray, Ill. Ind. Zool., ii, pi. 46 (1833).
Type, Tetraogallus himalayensis Gray.
This genus contains the birds known as Snow-Cocks, all of: considerable size. The wing is rounded, the first primary about equal to the sixth, the second longest; the tail is equal to about two-thirds the length of the wing and is well graduated; the tarsus is short, feathered at the base and armed with a spur ; a naked space behind the eye.
Sexes alike or only differing slightly.
The genus is confined to the mountains of Central Asia from Asia Minor to Western China.
Key to Species.
A.Lower breast and abdomen dark grey……………T. himalayensis, p. 426.
B.Lower breast and abdomen white with black streaks…………T. tibetanus, p. 429.