ro.i3l7. MA3IMALS OF NORTHWEST SUMATRA— MILLER. 455 



Cranial measurements of t3^pe: Greatest length, 49.4 (52); basal 

 |length, 43 (43.6); basilar length, 40.4 (40); length of nasals, 15 (16.4); 

 breadth of both nasals together anteriorly, 7.4 (7.4); distance from 

 front of nasal to back of frontal, 25 (27.6); diastema, 11.6 (11.6): least 

 interorbital breadth, 18 (18); zygomatic breadth, 29 (30); mandible, 

 32 (32.4); maxillary tooth row (alveoli), 9 (9.<;); mandibular tooth row 

 (alveoli), 9.8 (lO). 

 , Specimens examined. — Eight, all from the type locality. 



Hemarh'i. — The specimens of this squirrel show no noteworthy 

 variations. 



SCIURUS UBERICOLOR, new species. 



Ti/pe.—Adu\t female (skin and skull), .Cat. No. 114373, U.S.N.M. 

 Collected on Pulo Tuangku, Banjak Islands, Fel)ruary 5, 1902, by Dr. 

 W. L. Abbott. Original number, 1517. 



Characters. — In general appearance like Sciurus saturatus and S. 

 pretiosus^ but red of underparts darker and duller than in either and 

 median line of belly frequently blackish; tail not distinctly darker 

 than back; outer lateral stripe reduced in both length and width; size 

 nearly as in S. saturatn.s. 



Color. — The general color is closely similar to that of Scluriis satu- 

 rahis and S. pretiosus^ but the tone of the upperparts is lighter than 

 in the former and more red than in the latter. Tail more coarsely 

 grizzled than back, but the general effect scarcely darker. Outer 

 lateral stripe of the same dull color as in the related forms, but its 

 length usually less and its width generall}^ not more than half as great 

 (about 5 mm. at middle in tj^pe). Underparts a duller red than in the 

 related species, this due chiefly to the darker bases of the hairs. Along 

 median line the dark bases increase sufficiently to form a distinct 

 median dusky stripe in some specimens (including the type). The 

 black lateral stripe tends to extend its inner margin in the same manner. 



Skull and teeth. — The skull and teeth are essentially like those of 

 Sciurus saturatus. 



Measurements. — External measurements of type: Total length, 405; 

 head and body, 215; tail vertebrae, 195; hind foot, 51 (48). Average 

 of seven specimens from the type locality; total length, 389 (345-415); 

 head and body, 215 (205-225);* tail vertebra?, 180 (170-210); hind foot, 

 49.3 (46-51); hind foot without claws, 45.9 (43-48). For details see 

 table, page 456. 



Cranial measurements of type: Greatest length, 52; basal length, 

 44; basilar length, 41.4; length of nasals, 17; breadth of both nasals 

 together anteriorly, 7; distance from front of nasal to back of frontal, 

 38; diastema, 13; least interorbital breadth, 19; zygomatic breadth, 

 34; mandible, 34; maxillary toothrow (alveoli), 9.6; mandibular tooth- 

 row (alveoli), 9.8. 



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



