Mammals from Ctntral and Western Asia. 759 



This species fuims uitli 6'. viacropygmaus and aumwus a 

 group of slircwa with tlie (.■s.sciitiiil cliaractcis ot «S. iniinitus, 

 but equalling 6'. araneus in size. It may bo di.stinf^uislied 

 iVom its two allies by the proportionally greater size of 

 the posterior unicuspids and its longer muzzle ; it is also 

 slightly larger than either of them, as gauged by its cranial 

 dimensions. 



Microtus agresiis moriQoJ, subsp. n. 



Like the European M. agrcntis, but \\\{\\ much larger 

 bulUe. 



External cbaracters as in agrcstis, the colour slightly paler 

 than in Norwegian specimens of that animal. Under surface 

 washed with dull butiy greyish, 



k^kuU a})parcntly similar in all respects to that of true 

 agresiis, except that the bullae are decidedly larger, more 

 fully inflated, clo.-er together n)esially, and standing up 

 higlicr above the basis of tbe skull. Teetli quite as iu 

 agresh's, the extra prism on m^ well developed. 



Dimensions of the type (measured in fltsh) : — 



Head and body 98 mm. ; tail 32; hiud foot (s. u.) 18 ; 

 ear 12. 



bkull : condylo-incisive length 26; basilar length 23'2 ; 

 zygomatic breadth 14'5 ; nasals 7'2 ; interorbilal breadth 

 3*7 ; palatal loramina 4"7 ; length of bulla 8 ; upper molar 

 series (crowns) 5"8. 



JJaO. Kemtchik Valley, Tannu-ola Mts., N.W. Mongolia. 

 Alt. 4200'. 



Ti/pe. Adult male. Original number 188. Collected 

 4th August, 1910. 



Considt-ring its locality, this animal is surprisingly like 

 the true J7. ogrestis of Scandinavia, diflf'ering, so far as 1 am 

 able to see, only by its larger buUce. No Asiatic vole allied 

 to it and possessing five prisms on rti^ has been described. 



Evotomys glareolus sauaiicus, sub.'ip. n. 



cJ. 158; ? . 163. Syansk Mts., 100 miles W. of Lake 

 Baikal. 1600'. 



(?) ? (young). 172. Syansk Mts., 100 miles W. of 

 Lake Baikal. IGOO'. 



8ize rather small. Colour very much as in the dark races 

 of E. glareolus, E. g. hritannicus, and siiecicus. The rufous 

 area of the back, however, is narrower, so that the grey of the 

 sides shows more in the upper asj)cct ; the head also is greyer 

 and less rufous. Sides and under surface dark grey in the 



