miller] seventy new MALAYAN MAMMALS 7 



very dark, blackish vandyke-brown, the hairs fading to a light drabby 

 buff below middle. This color appears faintly at surface along under 

 side, but scarcely more than enough to throw the dark median line 

 of short hairs into contrast. 



Skull and teeth. — The skull is slightly larger than that of Ratufa 

 femoralis, the interpterygoid space is wider and the nasal bones and 

 audital bullae are longer. Teeth as in the related species. 



Measurements. — External measurements of type: total length, 

 725 ; head and body, 340; tail vertebrae, 385 ; hind foot, 74 (70). 



Cranial measurements of type : greatest length, 65 ; basal length, 

 54; basilar length, 50; length of nasals, 21 ; greatest breadth of both 

 nasals together, 12 ; least interorbital breadth, 26 ; zygomatic breadth, 

 38; mandible, 39.6; maxillary toothrow (alveoli), 12.8; mandibular 

 toothrow (alveoli), 13.6. 



Specimens examined. — Eight, all from Tana Bala. 



Remarks. — This squirrel is readily distinguishable from all other 

 known members of the genus except those occurring on Tana Masa 

 and Pulo Pinie by its rich coloration, blackish tail, and conspicuous 

 femoral spot. The tail is nearly as dark as that of Ratufa nigrescens, 

 but in the Mansalar animal the back also is blackish, and the 

 femoral spot is obsolete. In Ratnfa femoralis the back is distinctly 

 lighter than the belly, while the opposite is true of the Batu species. 



RATUFA MAS^ sp. nov. 



Type. — Adult male (skin and skull). No. 121,818, United States 

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

 ary 21, 1903, by Dr. W. L. Abbott. Original number, 2330. 



Characters. — Like Ratufa balce, but entire head grayish, in distinct 

 contrast with back. Femoral spot large and well defined. 



Color. — The color so closely resembles that of Ratufa balcc that no 

 detailed account is required. The whole crown and forehead, how- 

 ever, are a grizzled yellowish gray, noticeably lighter than rest of 

 upperparts. In the grizzled area the hairs are slaty at base, then 

 yellowish brown, followed by a conspicuous whitish cream-buff an- 

 nulation and a dark tip. Cheeks clear grizzled gray, the general 

 effect between the hair-brown and smoke-gray of Ridgway, the 

 same color extending as a broad band across throat and chin. 

 Femoral spot large and conspicuous, whitish cream-buff. 



Measurements. — Measurements of type: total length, 730; head 

 and body, 340; tail vertebrae, 390; hind foot, 72 (69) ; skull, greatest 

 length, 62 ; basal length, 52 ; length of nasals, 20 ; interorbital con- 

 striction, 25 ; zygomatic breadth, 39. 



Specimens cramincd. — Four, all from Tana Masa. 



