SINO-MONGOLIAN FRONTIER 
subluteus) 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 
bedfordt 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 bulle 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 Fén Ho in the winter of 
1909-10. 
The other pika (O. sorella) was trapped by me 
in a wood. Itis avery 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 Shén- 
Kan, and may be found in the appendix attached 
to that book. 
Owing to unavoidable delay, the description 
of the new roe-deer, Capreolus melanotis, secured 
- 179 
