86 Allen's naturalist's library. 



narrow white band down the middle of the chin and upper 

 half of the throat, and the upper tail-coverts yellowish-grey, not 

 rufous. Total length, 26'4 inches; wing, 1 1 ; tail, 7*2 ; tarsus, 2*2. 

 I have not examined the typical examples of this species, 

 but I think it very probable that they will prove to be merely 

 younger examples of T. tibetanns, which agree closely with the 

 above description. The difference in size is probably due to 

 individual differences in the mode of measuring and to the 

 "make" of the skins, which have perhaps been unnaturally 

 stretched. 



III. THE ALTAI SNOW-COCK. TETRAOGALLUS ALTAICUS. 



Perdix aliaiciis, Gebler, Bull. wSci. Acad. St. Petersb. i. p. 31 



(1S37); iv. p. 30 (1840). 

 Tetraogallus altaicus^ (iray, P. Z. S. 1842, p. 105; Gould, B. 



Asia, vii. pi. 31 (1853); Ogilvie-Grant, Cat. B. Brit. Mus. 



xxii. p. no (1893). 



{Plate IX.) 



Adult Male and Female. — Easily recognised from T. tibetanus 

 by having the sides of the neck grey, and the basal part of the 

 outer (primary) flight-feathers white, but there is no white at 

 the base of the secondaries ; from the other species it may be 

 distinguished by its white under-parts and the feathers of the 

 sides being uniform white. Bill blackish horn-colour ; feet 

 orange-red. 



Male : Total length, 23 inches ; wing, 10-9 ; tail, G'S ; tarsus, 

 2*4. T\\Qfe/nak\s slightly smaller. 



Range. — Higher chains of the Altai Mountains. 



IV. THE HIMALAYAN SNOW-COCK. TETRAOGALLUS 

 HIMALAYENSIS. 



Tetraogallus himalayensis^ Gray, P. Z. S. 1842, p. 105 ; Gould, 

 B. Asia, vii. pi. 30 (1853); Hume and Marshall, Game 

 Birds of India, i. p. 267, pi. (1878); Gates, ed. Hume's 

 Nests and Eggs Ind. B. iii. p. 46 (1890); Ogilvie-Grant, 

 Cat. B. Brit. Mus. xxii. p. 106 (1893). 



