SINO-MONGOLIAN FRONTIER 



size as M. mandarinus, but with a very much 

 smaller skull. The skull is narrower than in 

 either M. Johannes or M. pullus, but not 

 nearly so narrow as in M. angustus. Of a 

 lighter colour than M. angustus, it has a 

 larger hind foot, though in other body 

 measurements the two are very similar. 



While M. angustus seems to keep away from 

 camps and buildings, our present species is 

 essentially a camp follower, as we were un- 

 able to trap them anywhere except immedi- 

 ately round the house and tents. Unlike M. 

 angustus this vole is nocturnal in its habits, 

 usually being trapped during the night. 



This interesting species was found to be 

 new and was named by Miller after Mr. War- 

 rington, who first discovered it.^ 



33. Craseomys shanseius, Thos. 



Seven specimens, 3 SS, 4 ??. Mountains 

 50 miles N.W. of T'ai-yiian Fu, Shansi. 

 5,500 ft. 

 Three specimens, 1 c^, 2 $?. Mountains 30 

 miles W. of K'uei-hua-ch'eng, N. Shansi. 

 7,000 ft. 

 This vole, which usually occurs in the 

 forested areas of the Shansi mountains, was 

 first described by Mr. Thomas from speci- 

 mens taken in the Chiao-ch'eng Shan, west of 



* Smithsonian Miscellaneous Collections, Vol. 60, No. 28. 



201 



