196 ON MAIMMALS FROM TURKESTAN AND TIBET. [Mar. 6, 



4. On a small Collection of Mammals obtained by Captain 

 Deasy in South Chinese Turkestan and Western Tibet. 

 By G. E. H. Barrett-Hamilton, F.Z.S. 



[Received March 2, 1900.] 



The small collection of mammals which is dealt with in the 

 present paper includes only 16 specimens of 5 species, all rodents. 

 These are, however, of considerable interest, since, apart from the 

 localities in which they were procured, two of them, a Vole and a 

 Jerboa, which I have named respectively Microtus lama and Dipus 

 deasyi, belong to hitherto undescribed forms. A third is the 

 extraordinary Eiieliore.utes naso, described by Mr. W. L. Sclater in 

 1890 from specimens obtained by the Hon. Charles Ellis some- 

 where iu Eastern Turkestau. The acquisition of examples of 

 this species (and genus) adds a valuable novelty to the collection 

 of mammals in the British Museum, whither Capt. Deasy's speci- 

 mens have found their way. 



The following is a list of the specimens: — 



Meriones cryptorhtnus Blanford, J. A. S. Bengal, ii. p. 108 



(1875). 



No. 99.11.5.1. o* . Kara Sai, Chinese Turkestan, 9th July, 1898, 

 altitude 9500 ft. 



Microtus (Alticola) lama, sp. nov. 



a & /3. No. 97.1.21.3 & 4. 25 miles south-east of Lake Arucho, 

 W. Tibet, altitude 16,000 ft., August 1897. 



y. No. 99. 11.5.2, "Camp, 1898," Chinese Turkestan, altitude 

 17,800 ft., August 8th, 1898. 



Native name, " Such Kun." 



Type, no. 97.1.21.3. 



Description. External characters similar to those of M. stracheyi 

 Thos., but with the teeth and posterior termination of the palate 

 very like those of M. roylei Ogilvie. Agrees with M. albicauda True 

 in that inTl has 8 salient augles, but has the tail far shorter. 



Dimensions of the type (in millim.) : — Dried skin. Head and 

 body 115 ; tail 12 ; hind foot with claws 19*5 ; hind foot without 

 claws 8 ; ear 11. 



Skull (damaged posteriorly) — zygomatic breadth 14*5 ; length of 

 nasals 8 - 5 ; palatal length 14 - 5 (from posterior termination of 

 palate to anterior margin of incisors). 



The specimen y appears to be the young of this form. 



Dipus deasyi, sp. nov. 



Type. No. 99.11.5.3. $, Nura, Chinese Turkestan, 7500 ft., 

 6th October, 1898 (origiual number 73). 



Description. In external appearance resembles D. loftusi Blanford, 

 but the colour of the upper surface is richer and not so brown ; 



