224 ilepsrs. H. C. Robinson and C B. Kloss on 



tail, except a black tip, ochraceous orange, terminal half 

 more chestnut. Under surface of body pale ochraceous 

 orange. 



Skull. — Closely resembles that of the adjacent form, P. n. 

 melanoins, but difters in the longer and broader postorbital 

 processes. 



Measurements. — Collectors' external measurements (taken 

 in the flesh) : — 



Head and body 417 (415*) mm. ; tail 486 (445) ; hind 

 foot 77 (74); ear 41. 



Skull: greatest length 70*5 (7()'l); condylo-basilar length 

 62-0 (60-0) ; interorbital breadth 14 (14 8) ; zygomatic 

 breadth 47'9 (46'2) ; cranial breadth 31*6; median length of 

 nasals 20-3 (21'0) ; diastema 15*1 (14'6) ; upper molar series 

 including j9»i^ 16'2 (151). 



Specimens examined. — Nine, all from the type-locality. 



Remarks. — The series is remarkably constant in the 

 characters above noted, and can be separated at a glan(;e 

 from the southern peninsular form by the greater extent of 

 the black areas and by the marked black tips to the hairs 

 of the back. 



Sciurus erythrrsus youngi, subsp. n. 



Type.— A^\x\t male (skin and skull). No. 1823/11, Fede- 

 rated Malay States IMuscum, collected on Gunong Tahan, 

 5-6000 ft.. Northern Pahang, by II. C. Robinson and C. H. 

 Kloss, July 19th, 191 1. Original no. 4428. 



Characters. — Allied io Sc. rubeculus, Miller f, but some- 

 what smaller and duller in colour, the head and tail lacking 

 the golden-orange suffusion so conspicuous in that race 

 (metatype examined). 



Colours. — Whole upper surface, chin, throat, chest, and 

 narrow median ventral line from chest to vent grizzled 

 black and buff, giving an olivaceous eU'ect ; a smaller pro- 

 portion of black in the grizzling of the under surface. Hands 

 and feet blackish, only slightly grizzled with buff; upper 

 part of the ears clad with ochraceous hairs ; basal portion of 

 tail above like the back, but more coarsely grizzled, rest 

 of the tail distinctly annulated with black and ochreous bulT, 

 the hairs with broad orange-bufl" tij)S. Under surface rufous 

 chestnut. 



* Mensnrements in paronthopos aro those nf an adult iiialo Pptm/n's/a 

 nifida 7ni'/anutm from J)u8uu Tua, Selaiigor, I'Vderated Malay Wtatcs 

 jMusoiim, No. 125()/0H. 



t .Sluillisouian Misc. Coll. IT), p. 22 (I'JO.U). 



