728 On new Rodents from Sze-ckivan. 



Hah. E-ama Song, between Nag-clm-ka ( = Ku-kou) an J 

 Ta-tsien-lu, W. Sze-cliwan, 



Ty2)e. Male. B.M. no. 11. 10. 3. 6. Original number 4. 

 Collected 2lst May, 1911, and presented by Capt. F. M. 

 Bailey. 



Tibetan name " Cbu-lo." 



This is the first example of the remarkable genus J/yo- 

 spalax to be found in Sze-chwan, and it is therefore probably 

 very local in distribution. Its nearest geographical ally is 

 J/, cansus of Tao-chou, Kan-su, some 400 kilometres to the 

 }iorthward, and it is also most nearly allied to that animal 

 zoologically, but may be distinguished by its hairy feet (that 

 species having them nearly naked), its shorter tail, and its 

 more complicated m^. 



Ochotona roylei cJmiensis, subsp. n. 



Allied to true roylei and to " nepalensis,^' but greyer. 

 Nasals longer. 



General colouH', in winter pelage, very similar to that of 

 0. roylei and nepalensis^ but clearer and paler grey, and 

 entirely without the rufous tinge nearly invariably found on 

 the head and flanks in that animal. Subtermiiuil rings on 

 the body-hairs almost white, without bufty suffusion. Tips 

 of belly-hairs greyish white, not bufFy or drab. Ears not 

 especially large, metentote greyish with pale brown edge. 

 Upper surface of hands and feet greyish white, with scarcely 

 a trace of buffy tinge. 



Of the summer pelage, two small patches are to be found 

 on the specimen. One, behind the ear, is pale ochraceous, 

 much paler than the warm ochraceous-rufous of the summer 

 ear-patches of 0. roylei. The other patch is on the flank, 

 and again differs from the corresponding fur of 0. roylei by 

 its paler colour, as indicated by the whitish subterminal rings 

 to the hairs. 



Skull, on the whole, very like that of 0. roylei, but the 

 nasals are longer and narrower, and the bulhe are rather 

 smaller. Two w^ell-marked interorbital vacuities present in 

 the type. 



Dimensions of the type : — 



Head and body 180; hind foot 32; ear 30. 



Skull: greatest length 4G"5 ; condylo-incisive length 4 4*3; 

 greatest breadth 23 ; nasals 15*7xr)G; interorbital breadth 

 5'5; breadth of brain-case 18*3; palatal loianiina 12'8; 

 upper molar series (alveoli) S'G. 



JJab. Yara-tsa-ga, near Ta-tsien-lu, Szc-chwan. 13,000'. 



