THE BIEDS OF MONGOLIA ETC. 145 



built of dry branches, on some protruding rock, which usually is quite inac- 

 cessible. Only once, in the middle of May, in the mountain-chain of Shara- 

 had, could I reach a nest, which contained two young birds covered with 

 snow-white down; and close to them was lying a half-devoured Ptarmigan. 

 Measurements:— 





Length. 



Width. 



Wing. 



Tail. 



Culmen. 



Gape. 



Tarsns 





in. 



in. 



in. 



in. 



in. 



in. 



in. 



d' . 



. 29 



72 



22-5 



11 



205 



2-6 



3-83 



? . 



. 32 



? 



24 



11-5 



216 



2.82 



3-88 



8. Aquila clanga, Pall. Orel Caragush. 



Only one male specimen was obtained by us in the spring of 1871, at 

 the Dalai-nor. Since then we have met with this Eagle two or three times in 

 S.E. Mongolia, but did not observe it either in Kan-su or Koko-nor. By 

 small size and short tarsus our species approaches very nearly A, ncevia, 

 Briss., and perhaps forms the intermediate link between these two species. 



Measurement of our male specimen :— Length 24'', width 55'', wing 19"-5, 

 tail 9"7, culmen l"-82, gape 2"-2, tarsus 3"-9. 



9. CiRCAETUs GALLicus, Gmel. Cratchun goliibonogey. 



Has only once been met with in the valley of the northern bend of the 

 Yellow River. Here, at the entrance of a mountain-gorge in the Hara-narin 

 mountain-chain, I found a nest, on the 5th of May, situated on a high elm 

 tree, and built very carelessly and loosely of small dry sticks. It was very 

 flat and of an oval shape, and lined inside with green but, at the time, some- 

 what dry twigs and leaves of the elm. Only one deeply incubated egg was 

 lying in the nest. Just before dusk, when it was found, the male bird 

 was sitting; which afterwards was slightly wounded with shot by me. 

 Notwithstanding this, however, the same bird was sitting next day on the 

 eggs, and so closely that we could only after some trouble get it ofl^ the nest. 



VOL II. X 



