Lyon — Descriptions of Four New Treeshrews. 1G9 



Diagnostic characters. — Related to Tupaia splendidula of Borneo from 

 which it differs in a generally brighter and more reddish coloration of the 

 upperpartSj sides, legs and tail, and more inflated braincase. 



Color. — Type: General color effect of upperparts of neck and body, in 

 fresh pelage, most like Ridgway's burnt sienna, but rather brighter, this 

 color being produced by a wide band on most of the hairs, of a bright 

 ferruginous burnt sienna mixture, with blackish bases and a considerable 

 number <>f long blackish hairs; on rump, where an old pelage persists, 

 the general color darker and duller; sides of body and outer side of legs 

 similar to upperparts, but showing a tendency to grizzling; top of nose a 

 grizzle of raw sienna and blackish gradually blending in on top of head 

 with color of upperparts; cheeks and sides of neck an indistinct grizzle 

 of blackish and buff olive; shoulder-stripe buffy to ochraceous buff; an 

 indistinct huffy ochraceous eye ring; underparts generally a color between 

 buff and olive-buff; inner side of legs essentially like sides of body, but 

 rather lighter; tail above generally like back, but in dull worn pelage; 

 underside of tail and bases of tail hairs generally, tawny ochraceous, with 

 the outer and terminal margins of tail dark tawny. A paratype, a barely 

 adult female, is generally like the type in color, but shows distinct griz- 

 zling on sides of body, on neck, shoulders and thighs, and indistinct 

 grizzling on upperparts generally. 



Skull and teeth. — These are of the same general form as they are in T. 

 splendidula, the skull averages longer, however, has a more inflated 

 braincase, and the teeth are distinctly larger. 



Measurements. — Type and those of Cat. No. 151,883, T. splendidula, 

 from Klumpang Bay, southeastern Borneo; head and body, 184, 189; 

 tail, 140, 130; hindfoot, 40, 41; condylobasal length of skull, 4(i, 44; 

 zygomatic width, 25, 25; width of braincase above roots of zygomata, 

 19, 17.5; maxillary toothrow (alveoli), 18.5, 17. 



Specimens examined. — Two, the type, and skin and skull, Cat. No. 

 104,715, a young adult female, also from Bunguran Island. 



Tupaia sincepis sp. now 



Type.— Skin and skull of adult male, Cat, No. 123,105, U.S. N. M., 

 collected on Pulo Singkep, Rhio-Linga Archipelago, August 8, 1903, by 

 Dr. W. L. Abbott, Orig. No. 27:12. 



Diagnostic characters. — A slightly differentiated form of Tupaia malac- 

 cana with a more rufescent color on the back, and with a darker and 

 more blackish tail. 



Color. — Type: Upperparts of head, neck, and body, and outer side of 

 legs, a line grizzle of buff and blackish, the buff color being gradually 

 replaced by tawny ochraceous on the lower back, rump, and base of tail; 

 underparts varying from pale buff, or cream color anteriorly to dirty 

 whitish posteriorly; inner side of legs similar to adjacent portions of 

 underparts; tail, above, an indistinct grizzle of ochraceous buff and black, 

 the latter color in excess especially along margin and tip of tail; middle 

 portion of underside of tail cream buff finely lined with blackish, outer 



