1,0.1317. MAMMALS OF NORTHWEST SUMATRA— JflLLER. 449 



head and body, 332 (320-340); tail vertebra, 396 (365-410); hind foot, 

 77.2(75-79); hind foot without claws, 70.4 (69-72). For details see 

 table, pag-e 450. 



Cranip-l measurements of type: Greatest length, 66 (64) ;« basal 

 Icng-th. 55 (54); basilar length, 52(50); length of nasals, 21.4(21); least 

 interorbital breadth, 25 (26); zygomatic breadth, 38 (40); mandible, 40.4 

 (40); maxillary tooth row, 13 (12.6); mandibular tooth row, 14 (13). 



Sj?eciviens examined. — Five, all from the type locality. 



Remarl's. — The live specimens of Ratufa ntyrescens show no individ- 

 ual variation worthy of note. This squirrel — one of the most striking 

 of the genus — is immediately recogniza])le by its rich blackish-brown 

 upper parts and tail and yellowish- brown luider parts. The tail is 

 apparently more bushy than in the related species. 



RATUFA PALLIATA Miller. 



1902. Ritliifd biculor lujpolcuca Stone and Kehn, Proc. Acad. Nat. Sci. Philadel- 

 phia, 1902, p. 134, June 4, 1902. Not Sciurus hiipoleucoa Horsfield. 



1902. Ratufa pal/iata Millek, Proc. Acad. Nat. 8ci. Philadelphia, 1902, p. 147, 

 June 11, 1902; Indragiri Kiver, Sumatra. 



An immature female was taken at Tapanuli Buy, Sumatra, March 

 28, 1902. For measurements see table, page 450. It closelv agrees 

 with the original specimens of Ratufa palUata and with the skin from 

 the Lampong district, recorded by Stone and Rehn as R. hypoletica.^ 



RATUFA LiENATA, new species. 

 (Plate XIX.) 



Type.—X&wXt male (skin and skull). Cat. No. 114350, U.S.N.M. 

 Collected on Pulo Tuangku, Banjak Islands, January 27, 1902, by Dr. 

 W. L. Abbott. Original number, 147S. 



Characters. — Externally similar to Ratufa- palUata, but hind foot 

 not as long (see table of measurements, p. 450); general form of skull 

 as in U. palliata, but nasal branches of premaxillaries extending farther 

 behind nasals, and anterior median termination of maxillaries narrower. 



Color. — The color of Ratufa Ixnata so closelj^ resembles that of 

 R. paJliata as to need no detailed description. The twelve skins show 

 considerable variation in color, due partl}^ to the greater or less suffu- 

 sion of dark brown in the mantle, and partly to bleaching. None, 

 however, shows any approach toward R. hicolor or R. melanopepla. 



SI' ul I and teeth. — While the general form of the skuli shows no 

 characters by which it may be distinguished from that of Ratufa 

 paUlata, the outline of certain individual bones is peculiar to the 

 Tuangku animal. In R. palliata the premaxillaries scarcelv extend 

 behind the nasals, while in R. Isenata their posterior extremity is 



'''Measurements in parentheses are those of a considerably older female of Ratufa 



bunyuranensis (No. 1046-36). 



*For the opportunity to examine this specimen 1 am indebted to the kindness 

 of Mr. Witnier Stone and the othcers* of the Academy of Natural Sciences of 

 Philadelphia. 



Proc. N. M. vol. xxvi— 02 31 



