NO. 1317. MAMMALS OF NORTHWEST SUMATRA— MILLER. 451 



SCIURUS MANSALARIS, new species. 



r?/i?<?.— Adult male (skin and skull), Cat. No. 114633, U.S.N.M. 

 Collected on Pulo Mansalar, oti' Tapanuli Bay, Sumatra, March 2, 

 1902, b}^ Dr. AV. L. Abbott. Original number, 1583. 



Characters. —Size and general appearance about as in Schiru-s tefnc/s, 

 but underparts clear gray as in S. hrookel. 



6(y/f/'.^Upperparts, sides of body, and outer surface of limbs a 

 uniform tine grizzle of raw sienna and black, neither of which distinctly 

 predominates, though the raw sienna is slightly in excess on shoulders, 

 flanks, and outer surface of legs. Feet and sides of head like back, 

 but paler and more closely grizzled. Underparts and inner surface of 

 legs mouse gray washed with dull white. On chest and hind legs 

 there is a faint brownish tinge. Hairs of tail with six color l)ands: {<{) 

 extreme })ase black, (J) 1.5 mm. raw sienna, {c) 2 mm. black, {d) 4 mm, 

 raw sienna, (r) mm. black, {f) 4 mm. whitish cream buff. The gen- 

 eral effect aboxe is a coarse grizzle, chiefly of black and whitish cream 

 buff", through which the raw sienna appears when the hairs are disar- 

 ranged. Below there is a broad median area of dull raw sienna edged 

 with black, this fringed with whitish. 



Skull and teeth. — The skull very closely resembles that of Sciurus 

 tenuis but is a little narrower, longer, and deeper, characters that 

 suggest, though very remotely, the much larger skull of S. hrookei. 

 Teeth as in Scuirus tenuis. 



Measurements. — External measurements of type: Total length, 255; 

 head and body, 140; tail vertebrte, 115; hind foot, 37 (35). Average of 

 eight specimens from the type locality: Total length, 259 (245-278); 

 head and body, 146.5 (135-158); tail vertebra?, 112 ( 8-122); hind foot, 

 37 (36-38); hind foot without claws, 35.4 (33-35). For details see 

 table, page 452. 



Cranial measurements of t3'pe: Greatest length, 38; basal length, 32; 

 basilar length, 29; length of nasals, 12; least interorbital breadth, 13; 

 zygomatic breadth, 22.6; diastema, 8.8; mandible, 24; maxillarv tooth 

 row (alveoli), 7.4; mandibular tooth row (alveoli), 7. 



Specimens examined. — Eight, all from Pulo Mansalar. 



Remarhs. — This squirrel is readily distinguishable from Sciurus 

 tenuis by its clear gray underparts, a character that gives it a close 

 superficial resemblance to the much larger S. hrookei of Borneo. Its 

 relationships are undoubtedly with Sciurus tenuis^ as the skull shows 

 only a slight tendency toward the relatively narrow, elongate form 

 characteristic of the Bornean species. 



SCIURUS BANCARUS, new species. 



Type.—Ki\\x\t male (skin and skull), Cat. No. 114311 U.S.N.M. 

 Collected on Pulo Bangkaru, Banjak Islands, January 17, 1902, by Dr. 

 W. L. Abbott. Original number, 1422. 



