On a new Species of T-dmias ft'om Eastern Siberia. 385 



XLV. — On a new Species of Tamils from Eastern Siberia. 

 By J. L. BONHOTE. 



I HAVE recently received three specimens of a Tamias from 

 Corea whicli, on comparison with specimens in the British 

 Museum, I am unable to refer to either of the hitherto described 

 species, namely Tamias asiaticus (Gm.) and Tamias senescens, 

 Miller. They agree, however, with two other specimens from 

 the River Ussuri in Eastern Siberia which were labelled 

 Tamias uthensis (Pall.). Pallas's description does not appa- 

 rently agree with the specimens, for, apart from other differ- 

 ences, he writes " Sub collo tractus longitudinalis albus, a 

 labio inferiore ad sternum continuus ; cseterum pars prona tola 

 nigra^'' whereas in the specimens under consideration the 

 whole of the underparts are pure white. 

 I propose to call this species 



Tamias orientalis, sp. n. 



Much brighter and ruddier in general coloration than either 

 of the other species. There are five dark stripes on the back, 

 the two outer ones being sometimes brownish, the remainder 

 black, and alternating with these four stripes of a lighter 

 colour. The subdorsal light stripes, as well as the whole of 

 the hinder part, strongly suffused with ferruginous. There 

 is a supraorbital stripe of white, which is clearly defined and 

 continued forwards to the tip of the nose. The underparts 

 are of a clear white. 



The skull shows no marked differences ; in length it is 

 intermediate, but in breadth equal to the larger of the other 

 species. The most noticeable point is the length of the nasals, 

 which are longer and narrower than in T. senescens. 



Dimensions of the type (from skin) : — 



Head and body 155 millim, ; tail 115; ear 15; hind 

 foot 35. 



Skull: basal length 31; zygomatic breadth 22-5; length 

 of nasals 13 ; post, breadth of nasals 4. 



Eah. Eastern Siberia. 



Type B.M. 94. 8. 6. 26. S ad. Sungatscha River, Upper 

 Ussuri River. Collected by Mr. J. ICalinowski, 16tli April, 

 1884. 



1 his species may easily be distinguished from T. asiaticus 

 by the subdorsal light stripes being considerably ruddier and 

 darker than the outer ones, whereas in T. asiaticus they are 

 all of a similar colour. It may also be distinguished from 



