SINO-MONGOLIAN FRONTIER 



suhluteus) was described as a new subspecies, its 

 distinguishing feature being a general paling of 

 colour. 



The two remaining species in the collection, 

 which were new to science, are two pikas, Ochotona 

 hedfordi and O. sorella, both described from the 

 Ning-wu Fu district in Shansi. The first is a large 

 pika allied to 0. dauurica from the Mongolian 

 Plateau, but with larger bullae and slightly larger 

 in size. In colour it is slightly paler than the 

 Mongolian form. In habits the two animals are 

 very similar. Some pikas caught at Yen-an Fu 

 in Shansi were also referred to this species, but a 

 specimen in its winter coat secured by me near 

 Yen-an Fu, on the Clark Expedition, was dis- 

 tinctly paler and less yellow than a specimen 

 from Ning-wu Fu district taken by me on our 

 expedition up the Fen Ho in the winter of 

 1909-10. 



The other pika (0. sorella) was trapped by me 

 in a wood. It is a very small, dark-coloured species, 

 nearly related to O. cansa from Kansu. 



The next collection from North China was that 

 made on the Clark Expedition from September, 

 1908, to the same month in 1909. The details 

 of this collection were published in Through Shen- 

 Kan^ and may be found in the appendix attached 

 to that book. 



Owing to unavoidable delay, the description 

 of the new roe-deer, Capreolus melanotisy secured 



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