432 THE BIHDS OF MONGOLIA ETC. 



T]i^ female is of the same size as the male, and differs from him only 

 by not having a black throat, but a pale yellow one, marked with blackish 

 spots and less distinctly edged with white ; also the white above the eyes 

 does not reach so far as in the male. 



I have named the present species after our well-known ornithologist 

 N. A. Severtzoff. We found it only in the Kan-su mountains, in the lower 

 and middle mountain-ranges — that is, up to an elevation of 10,000 feet above 

 the level of the sea. It inhabits the larch and fir forests, and seems to be 

 particularly fond of small clefts through which brooks are running, and the 

 sides of which are covered with thick bushes. In its habits and voice 

 it resembles its European relation. I only once succeeded in finding 

 its young, in August ; and at that time they were very little smaller than 

 their parents. On our approach they left the ground and settled on the 

 trees, when the female bird at once commenced to call, something like 

 " mity mity mitJ" 



Its range does not appear to extend north beyond Kan-su. 



Order VI. GRALL^E. 



208. Otis tarda, L. .^ Drofa dudak. 



Does not appear to breed here, and was observed by us in the Yellow- 

 River valley and about Shara-had only in winter in rather limited numbers ; 

 and during migration we met with several single birds in the Gobi desert. 



We found them breeding tolerably numerously in Ussuri-country, 

 especially about Lake Hanka. 



209. Otis MACQUEENi, Gray ? 



A small Bustard, probably belonging to the present species, was several 



