LYON] NEW SUMATRAN SQUIRRELS 281 
Measurements.—Skin of type: Head and body, 208 mm.; tail ver- 
tebre, 185; hind foot, with and without claws, 45 and 41. Skull of 
type: Basal length, 43.3 mm.; zygomatic width, 29.5; interorbital 
constriction, 18; brain-case above roots of zygomata, 23; maxillary 
toothrow, 9. 
Specimens examined.—Nine skins, with skulls, from Tapanuli 
Bay. 
Remarks.—Although close to the typical form, Sciurus vittatus 
_ tapanulius is easily distinguished by having the upper surfaces of 
the feet generally concolor with the upper parts of body, by the 
yellowish cheeks, and by the less clear black side stripe. It some- 
what resembles S. ictericus Miller? of the Batu Islands, but the cheeks 
are not nearly so yellow and the light lateral stripe is much clearer. 
SCIURUS VITTATUS ALBESCENS (Bonhote) 
1901. Sciurus notatus albescens Bonuote, Ann. Mag. Nat. Hist., ser. 
7, vil, May, 1901, p. 446. 
Type.—British Museum, 85, 8, 1, 235. I have not seen this, but 
regard the Loh Sidoh Bay specimens as topotypes. 
Distribution.—Northern Sumatra. 
Diagnostic characters——Differs from typical Sciurus vittatus in 
having paler underparts which, as well as the black lateral stripe, are 
lined with a few or many white hairs. Somewhat like Sciwrus 
pannovianus Miller? but black stripe much narrower. 
Color.—Upperparts and tail as in the typical form, a fine grizzle, 
coarser on the tail, of black and tawny-olive. Upper surfaces of 
feet a grizzle of ochraceous-buff and black. Cheeks, dull ochraceous- 
buff. Underparts and inner surfaces of legs, a color between orange- 
rufous and pinkish-buff, sprinkled with few or many white hairs. 
Light lateral stripe, 3-5 mm. wide, cream-buff; black stripe, 5 mm. 
wide posteriorly, 10 mm. anteriorly, sprinkled with few or many 
white hairs and some of the rufescent hairs of the underparts; the 
black hairs are dark to their bases where they are slate color. 
Measurements.—No. 143400, United States National Museum, 
from Aru Bay: Head and body, 205 mm.; tail vertebra, 200; hind 
foot, with and without claws, 44, 40. Skull: Basal length, 42.2 mm. ; 
zygomatic width, 28.7; interorbital constriction, 17.5; brain-case 
above roots of zygomata, 23; maxillary toothrow, 9. 
Specimens examined.—Two skins and skulls from Aru Bay, and 
eight from Loh Sidoh Bay. 
*Smithsonian Miscell. Coll., xiv, p. 12, November 6, 1903. 
? Smithsonian Miscell. Coll., xiv, p. 11, November 6, 1903. 
