1902,] NATURAL SCIENCES OF PHILADELPHIA. 149 



Specimens Examined. — Three, the type; also two otlier specimens 

 from Sumatra, exact locality not known. 



Remarhs. — The three specimens show no marked variation in 

 color. The type is rather lighter than either of the others, both of 

 which are in somewhat worn pelage. Both of these have the base 

 of the tail nearly black, and in one the pale mantle is divided by 

 an indistinct dark-brown dorsal line about 30 mm. in breadth. In 

 Ratufa bicolor the back is black, thickly sprinkled wilh yellowish- 

 white hair tips, particularly on posterior half. There is thus no 

 indication of the pale mantle of E. pcdliata. The tail in the 

 Javan animal is clear buff above, the black bases of the hairs not 

 appearing at surface except at tip. The Javan and Sumatran 

 forms are, therefore, readily distinguishable. 

 Eatufa affinis (Raffles). 



Twelve specimens from Sinkep Island. These are not distin- 

 guishable from true Ratufa affinis, but the material representing 

 the latter is not wholly satisfactory and the Sinkep form may event- 

 ually prove to be distinct. 



Ratufa hypolecua (Horsfield). 



1824. Sciurus hypoleucos Horstiekl, Zoological Besearclies in Java 

 and tlie neigliboring islands (pages not numbered). 



Three adults (d", No. 113,163; d". No. 113,164, and ?, No. 

 113,165) were taken in heavy forest on the banks of the Indragiri 

 river, September 24, 1901. They represent a whitish-bellied 

 species closely related to Ratufa affinis, but readily distinguishable 

 by the darker ground color of the upper parts (approximately cin- 

 namon in hypolexica, Isabella color in affinis) and by the gi'ayish- 

 white cheeks and face which form a strong contrast with the crown 

 and sides of neck. As the type of Horstield's Sciurus hypnleucos 

 was obtained by Raffles, it was probably taken near Bencooleu, on 

 the southwest coast of Sumatra. It is not improbable, therefore, 

 that the Indragiri form may prove to be distinct, though so far as 

 can be determined from the original description Dr. Abbott's 

 specimens closely resemble those examined by ?Iorsfield, The 

 measurements of the three individuals arc as follows (arranged in 

 order as above) : Total length, 705, 700 and 700 ; head and body, 

 330, 320 and 330; tail vertebra, 375, 380 and 370; hind foot, 

 77, 78 and 79; hind foot without claws, 70, 71 and 73. Cranial 

 measurements of adult male TNo. 113,163): Greatest length, 62 



