SCIENTIFIC UESVLTS FROM THE MAMMAL SURVEY. 775 



form of Manipur, while punctatissimus, Gray, is the form from Cachar. 



The remaining named forms of the group have comparatively re- 

 cently been described in this Journal, including aquilo, which I named 

 as a subspecies of C. castaneoventris but which I now prefer, for the 

 reasons given above, to regard as a local race of erythrceus. The 

 following is a list : — 



C. erythrceus nagarum, Thos. and Wrought. Sadiya (xxiv p 2'>8 

 1916). 



C. erythrceus crotalius, Thos. and Wrought. Hkamti, Chind- 

 win (I.e.). 



C. erythrceus kinneari, Thos. and Wrought. Tatkon, Chind- 

 win (I.e.). 



C. erythrceus aquilo, Wrought. Dibong R., Lakhimpur (Vol 

 XXVII, p. 601). 



Finally, I jjropose to give a name to a form just received throucrh 

 the Mammal Survey, as follows : — 



Callosciurus erythr^us wellsi, sub. sp. no v. 



A Callosciurus of the size and general colour pattern of erythr,:euSy 

 but having a whitish tag at the tail tip. 



Size as in erythrceus. General colour above an olivaceous grizzle, 

 below bay, varying to dark hazel ; limbs like the back ; feet black. 

 Tail above grizzled like the back for some length, varying from one- 

 fourth to one-half or rather more, beyond bay to the end except for 

 the pale terminal tag ; below the grizzling extends much further alone 

 the tail, usually to within 50 mm. of the terminal tag. 



Skull as in erythrceus. 



Dimensions of the type , those of the body measured by the collec- 

 tor : — head and body, 235 ; tail, 260 ; hindfoot, 51 ; ear, 20. 



Skull. — Greatest length, 57-5 ; condylo-incisive length, 48 ; palatilar 

 length, 24 ; interorbital breadth, 20- 5 ; braincase breadth, 27 ; nasals 

 length, 17 ; upper molar tooth-row, 10' 5. 



^a6.— Jaintia Hills, Assam. Type from Shangpung. 



Tyj)e. — Adult, c? • B. M. No Original number 652. 



Collected 10th July 1920, by Mr. H. W. Weils and presented to the 

 National Museum by the Bombay Natural History Society. 



The character relied upon for the separation of this local race is not 

 an important one, but it is so constantly persistent throughout the 

 series as, in my opinion, to justify the separation. Eleven specimens 

 constitute the series, of which two have mutilated tails, but the 

 remainder are perfectly constant in showing the pale tag at the end 

 of the tail. 



The Key to the ' erythrceus group ' published in my ' Summary ' 

 (xxvi, p. 368, 1919) now requires to be recast, and as in the mean- 

 time it has been decided that stevensi is a Tomeutes and not a Callos- 

 ciurus, it seems advisable to rewrite almost the whole of the Key to 



