14 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vOL. 45 



The tail is invariably clear black, except at extreme base, a char- 

 acter which will serve to distinguish the animal from the Siporan 

 Sciurus melanogastcr at a glance, though the two species are of 

 about the same color and size. 



SCIURUS PINIENSIS sp. nov. 



Type. — Adult female (skin and skull), No. 121,800, United States 

 National Museum. Collected on Pulo Pinie, Batu Islands, Sumatra, 

 March i, 1903, by Dr. W. L. Abbott. Original number, 2344. 



Characters. — In general appearance like Sciurus natunensis 

 (Thomas), but size less, and skull with short, broad rostrum much 

 as in Sciurus tenuis. 



Color. — Upperparts a fine grizzle of black and dull light ochra- 

 ceous, the latter everywhere a little in excess, but more particularly 

 so on sides. Crown, feet, and outer surface of legs like back, but 

 darker and more finely grizzled. Cheeks, eye ring, and ill-defined 

 area about roots of whiskers nearly clear ochraceous. A wash of 

 the same color on anterior inner surface of thigh. Underparts and 

 inner surface of legs cream-buff, lighter than that of Ridgway an- 

 teriorly and on front legs, darkening posteriorly and on hind legs 

 almost to buff. The light and dark areas of front leg are separated 

 on outer side by an almost clear blackish line. Tail like back, but 

 darker above and lighter below, everywhere more coarsely grizzled ; 

 pencil black. 



Skull and teeth. — Skull smaller than that of Sciurus natunensis 

 and without elongation of muzzle. In size and general form it 

 closely resembles the skull of Sciurus tenuis, but is not as broad 

 interorbitally, the audital bullae are smaller, and the nasal bones are 

 shorter. Teeth as in Sciurus tennis and S. natunensis but much 

 smaller. 



Measurements. — External measurements of type : total length, 

 210; head and body, 134; tail vertebrae, 75 ; hind foot, 32 (29) ; ear 

 from meatus, 12.6; ear from crown, 7; width of ear, 10; skull, 

 greatest length, 35 ; basal length, 29.4 ; length of nasals, 9.4 ; 

 zygomatic breadth, 20.4; interorbital breadth, 11.2; maxillary 

 toothrow (alveoli), 5.6. 



Specimens examined. — One, the type. 



SCIURUS BALiE sp. nov. 



Type. — Adult male (skin and skull). No. 121,799, United States 

 National Museum. Collected on Tana Bala, Batu Islands, Febru- 

 ary 12, 1903, by Dr. W. L. Abbott. Original number, 2282. 



