702 TETBASTES 



ad. (Russia). Differs from T. bonasia in being much darker and 

 duskier ; upper parts dark grey, the head and back barred with blackish, 

 the former darker ; rump and upper tail-coverts dark grey with indistinct 

 darker bars ; tail like that of T. bonasia, but the subterminal band scarcely 

 indicated, and the white tip wanting ; chin and a streak from above the 

 eye white ; throat black slightly marked with dark rufous ; neck and 

 breast grey barred with black and marked with rufous ; rest of under 

 parts grey indistinctly barred with black ; flanks tinged with rufous ; bill 

 blackish horn ; feet greyish brown ; iris brown. Culmen 0'9, wing 6 '6, 

 tail 4'8, tarsus 1*35. The female is browner and less grey in colour, and 

 the black feathers on the throat are broadly tipped with buff. 



Hob. The Perm and Olonetz Governments west of Ural, 

 Russia. 



I do not find anything on record respecting the habits and 

 nidification of this species, which ; probably do not differ from 

 those of T. bonasia. 



981. MONGOLIAN HAZEL GROUSE. 

 TETRASTES SEVERTZOVI. 



Tetrastes severtzovi, Prjevalsky, Mongol i Strana Tangut, &c. ii. 

 p. 130, Taf. xviii. (1876) ; Ogilvie Grant, Cat. B. Br. Mus. xxii. 

 p. 93. 



ad. (Kan-su). Differs from T. bonasia in having the crown, nape, 

 neck, and upper parts generally warm reddish brown instead of grey in 

 ground-colour, and the whole of the lower back, rump, and upper tail- 

 coverts clearly barred with black ; under parts darker than in T. bonasia, 

 being black with a bar across the middle and the tips white ; breast washed 

 with warm reddish brown. Culmen 07, wing 7'0, tail 5*60, tarsus 1'3 

 inch. The female is a trifle smaller and has the chin and throat pale 

 yellow marked with black. 



Hob. The mountains of Kan-su,' Koko-nor, and the Hoang-ho 

 river. 



In general habits and note it is said to resemble T. bonasia. 

 It inhabits the mountains up to about the elevation of 11,000 

 feet, frequents the larch and fir forests, and particularly affects 

 small ravines through which brooks run, and which have the 

 sides thickly covered with bushes. So far as I can ascertain, 

 its nest and eggs are not known. 



