NO. 1317. 31AMMALS OF NORTHWEST SUMATRA— MILLER. 453 



This sciuiircl shows a striking- and unexpected resemblance to the 

 JSc/'k/'i/.s Khhottll of the Tanibelan Ishmds. The skins are quite indis- 

 tinguishable, except that the red element of the underparts is salmon 

 rather than rusty. The skulls show certain slioht though constant 

 differences. The rostrum is somewhat broader proportionateh" to its 

 length in the Smiiatran animal, and the audital bulhe are more inflated. 

 The maxillary teeth of Scmrus (dhescrufi^ while of the same general 

 size as in S. ahhAtll, may be distinguished b}' their less thickened 

 crowns, a character easily appreciated on comparison of the tooth rows 

 viewed from the lingual side. 



SCIURUS VITTATUS Raffles. 



1822. Sciurus vittatus Raffles, Trans. Linn. Soc. London, XIII, ji. 259; Ben- 



coolen, Sumatra. 

 1901. Sciurus vittatus Bonhote, Ann. and Mag. Nat. Hist., 7tli ser., YII, May, 



1901, p. 447. (Part.) 



Twelve specimens (two in alcohol, one skull without skin) from 

 Tapanuli Bay, Sumatra. For measurements see table, page 456. The 

 skins present no color variation worthy of note. In none is there 

 any indication of such red in the tail as is characteristic of Scii/nis 

 riihiiatus, though a few show a tendency for the light anuulations in 

 the pencil to be more tinged with orange than the}" are elsewhere. 



SCIURUS SATURATUS, new species. 



%>^. -Adult female (skin and skull), Cat. No. 114629, U.S.N.M. 

 Collected on Pulo Mansalar, off Tapanuli Ba3% Sumatra, March 9, 1902, 

 by Dr. W. L. AI)bott. Original number, 1633. 



CJiariietcr.s, — Similar to Sciurus rlttatus but general color darker, 

 pale lateral stripe less well defined, though of normal extent, and tail 

 noticeably darker than back, its pencil mostly black. 



C'olor. — T3'pe: Upper parts and sides a uniform fine grizzle of black 

 and ochraceous, the latter decidedl}- paler and less bright than that of 

 Ridgway. The two colors are everywhere mixed in nearh' equal 

 quantity and the hair is distinctly glossy. Outer surface of legs 

 somewhat paler and more buffv than back; cheeks and inner surface 

 of ear decidedly so. A distinct buff' e3^e ring. Muzzle marked with 

 light grayish ])uff. Lateral stripes of noriual extent, the upper one a 

 light grayish l)uff", quite different from the gra^nsh white stripe of S. 

 vittatus. Tail essentialh' like back, l)ut grizzle coarse, and black 

 element more noticeable, particularly along edge and at tip, where the 

 pencil is almost entirel v black. Under parts and inner surface of legs 

 intermediate between the ochraceous-rufous and tawn}' of Ridgwa}'', 

 but rather darker than either. This color extends to wrist and almost 

 to heel. 



Skull and teeth. — The skull and teeth resemble those of Sciurus 

 vittatus, though perhaps averaging slightlv larger. 



