SCIENTIFIC RESULTS FROM THE MAMMAL SURVEY. 663 



General colour rather paler than "deep olive" (Ridgeway) ; 

 hairs banded black and yellow. There is a darker, blackish tinge 

 on the back in some cases, mostly in yonng specimens, in many 

 adnlts it is very slight and hardly noticeable ; even in the most 

 pronounced examples it is onlj^ the ends of the hairs that are black ; 

 in the black patch of atrodorsalis, the hairs are black throughout. 

 The head is similar to the body in colour, whereas in atrodorsalis it 

 is reddish yellow ; the ears only in a. shanicus are rufescent. The 

 whiskers in all these specimens are black, the type of atrodorsalis and 

 most of the other skins have white ones. The fur is dark slate 

 grey at then base and then banded yellow and black. The underside 

 is like the back only more shaded with yellow, especially on the 

 underside of the arms and legs, which in some cases are rufous, but 

 none of the specimens have the chestnut red underside which is so 

 marked in most of the atrodorsalis skins. Feet, same colour as 

 body, tail banded black and yellow, the same as above. 



Skull characters as in atrodorsalis, as far as can be determined, 

 there being practically no whole skulls of the latter for comparison, 

 in some instances the zygomatic arch is wider in atrodorsalis. 



The co-types of Sciurus atrodorsalis are two dilapidated speci- 

 mens received from the East India Company's Museum, and 

 marked as coming from " Bhotan. " This is evidently a mistake, 

 as they closely agree with a series from Moulmein, which may 

 therefore be taken as the type locality. 



In addition to this present series of 32, there are 6 other speci- 

 mens available for comparison from the N. Shan States, and as 

 they are all very constant among themselves it seems necessary to 

 separate them subspecifically ; Mr. Wroughton had, I believe, in- 

 tended to separate them some time ago. 



Dimensions of the tyfe (measured in the flesh) ; — Head and body 

 208 mm. ; tail 183 ; 'hindfoot 48 ; ear 22. 



SJvull. — Greatest length 51 •1mm. ; condylo-incisive length 45-9 ; 

 basilar length 39*9 ; tooth row lO'o ; diastema 11-1 ; zygomatic 

 breadth 29-9 ; nasals 15. 



Habitat. — Gokleik. Northern Shan States, Burma. Alt. 2,133 

 feet. 



%9e.— Adult Male. B. M. No. 18.11.18.1. Original No. 2765. 

 Collected 23rd April 1913, by G. C. Shortridge, and presented to 

 the National Collection by the Bombay Natural History Society. 



A NEW FIELD-MOUSE FROM BUEMA. 

 F. — MUS COOKII, sp. n. 

 The BuriDia FieM-Mouse . 



A mouse most nearly resembling Mus hooduga but differing from 

 that species in being larger throughout. 



