COLLECTION OF MAMMALS FROM TIBET. 805 



the middle of winter they might be seen sunnh)g themselves at the entrance to 

 their burrows. I dug up a few burrows during the winter. The tunnel runs 

 more or less vertically downwards for 1 or 2 feet and then somewhat horizon- 

 tally for 4 to 6 feet. The passage is dilated at irregular intervals in some two 

 or three places. At these spots and at the end of the burrow, which is also 

 dilated, there is a certain amount of coarse grass collected to form a kind of 

 nest. The ground in many places is honeycombed with these burrows, which 

 sometimes communicate with one another close to the mouth, but, as a rule, 

 they are quite distinct. I never heard the animal utter a cry of any sort." 



