226 ON MAMMALS FROM NORTH BORNEO. [Mar. 15, 



without the rufous suffusion characteristic of S. tenuis. Cheeks, 

 anal region, and basal inch of tail below hrilliant rufous. Chest and 

 belly greyish white, the hairs grey basally, and dirty white termi- 

 nally. Tail-hairs broadly annulated with black and pale yellow. 



Skull (Plate XIX. fig. 6) with an elongated tapering muzzle, dis- 

 proportionately large for the size of the animal, although not nearly so 

 long as in ;S^. rufigenis, everetti. Sec. Premolars ^ 



Dimensions of the type, an adult female in tkin : — 



Head and body 205 millim. ; tail, without hairs, 144 ; hind 

 foot 37. 



Skull : basal length (c.) 37 ; bregma to nasal tip 32 ; greatest 

 breadth 25*6 ; nasals, length 13'2, combined breadth 7 ; interorbital 

 breadth 15 ; diastema 10*6; palate, length 22, breadth outside m^ 

 10-2, inside m^ 6 ; front of p^ to back of m^ 7 '4. 



This Squirrel belongs to a group of Oriental species characterized 

 by their dull grizzled olive-grey colour, unstriped sides, and annu- 

 lated black and yellowish tails. For ornamentation some of the 

 species have rufous patches on the head, shoulders, hips, or tail, but 

 some are quite without them, and in all they vary very much in their 

 development. To this group belong S. chinensis, Gr., S. lohriah, 

 Hodgs., 8. loTcrioides, Hodgs., S. tenuis, Horsf., S. lowii, Thos., 

 S. philippinensis, Waterh., and others. From all of these S. hrookei 

 is readily distinguished by its bright rufous cheeks and base of tail, 

 and by its size, in which respect it considerably exceeds 8. tenuis ^x\(i 

 S. lowii, and falls short of all the rest. S. modestus, Miill. & Schl., 

 I agree with Dr. Jentink ^ in considering synonymous with 8. tenuis, 

 as not only is Malacca the first-mentioned locality for it, but the 

 figures both of animal and skull are identical with typical Malaccan 

 and Singapore specimens. 



Of other Bornean species 8. jentinJci, Thos., is smaller and much 

 more yellow above, while ^S*. everetti, Thos., has a much more 

 elongated muzzle, and neither of them has the rufous markings of 

 8. brookei, 



I have taken the liberty of naming this species in honour of His 

 Highness the Rajah of Sarawak, in whose service Mr. Hose is, and 

 by whose active encouragement he has been enabled to do so much 

 valuable zoological work in that interesting territory. 



This species must be very common on Mt. Dulit, as Mr. Hose 

 states that he obtained 20 specimens of it while he was there. 



12. SCITJRUS MELANOTIS, Miill. & Schl. 



a. S. 2000 feet. 10/91. 



13. SciURUS WHITEHEADI, ThoS. 



o. d. 4000 feet. 10/91. 



This beautiful little species, described and figured in my paper on 

 the Kina Balu mammals, has only been previously recorded from 

 that mountain. 



^ Notes Leyd. Mus. v. )3. 125 (1883). 



