the Malay Peninsula and Islands. 305 



Hub. Northern Borneo. Type from the Bakong River, 

 Baram, E. Sarawak. 



Type. Adult male. B.M. no. 99. 12. 9. 35. Collected 

 7 May, 1893, and presented by Dr. Charles Hose. Four 

 Bornean specimens examined. 



Sciuropterus (Hylopetes) belone, sp. n. 



Most closely allied to 8. aurantiacus and S. spadiceus. 

 Colour as in all the members of the sagitta group, blackish slaty 

 above, broadly washed with fulvous on the head and back ; the 

 under surface white to the bases of the hairs anteriorly and 

 down the middle line of the belly, grey-based with buffy tips 

 on the sides of the belly and inner sides of the hind limbs. 

 Tail dark brown above and below, its middle layer buffy ; 

 the midrib below buffy proximally, dark brown terminally; 

 the tail is about as long as in aurantiacus, longer than in 

 spadiceus. 



Skull very similar to that of S. aurantiacus, of which the 

 type is now in the British Museum, but with the nasals 

 longer and more narrowed behind, the teeth broader, and the 

 bulla? less inflated vertically, but longer horizontally. As 

 compared with that of S. spadiceus, the nasals do not project 

 backwards beyond the frontal processes of the premaxilke, 

 and the teeth are very markedly broader. 



Dimensions of the type (measured in the flesh) : — 



Head and body 138 mm. ; tail 136 ; hind foot 26 ; ear 22. 



Skull : greatest length 35 ; basilar length 27*5 ; greatest 

 breadth 22'3 ; nasals 10*2; palatilar length 15'6; horizontal 

 length of bulla 10"2 ; length of upper tooth-series exclusive 

 of f 6-8. 



Hah. Pulo Terutau, Straits of Malacca. 



Type. Old male. B.M. no. 8. 7. 20. 61. Original number 

 523. Collected 1 December, 1907. Presented by the 

 Selangor Museum. 



This will probably prove to be the small Flying Squirrel 

 of the whole of the Malay Peninsula, but as yet members of 

 this group are so rare that but few localities are represented. 



Its two nearest allies are S. spadiceus from Arakan and 

 S. aurantiacus from Banka, but it differs from the former 

 by its longer tail and broader teeth, and from the latter by 

 its narrower nasals and differently shaped bulla?. The re- 

 maining members of the group — S. sagitta, Linn. (S. lepidus, 

 Horsf.), from Java, S. everetti, Thos., from the Natunas, 

 and 8. harrisoni, Stone, from Borneo — are all larger than 

 S. belone. 



Ann. & Mag. N. Hist. Ser. 8. Vol. ii. 21 



