SCIUHrS. 219 



and even orange-yellow. I have examined about thirty to forty specimens of 

 this variety. 



The squirrel from the Celebes, referred by Dr. Gray^ to Jf. ephippium and also 

 regarded by him as S. auriventer, belongs to the same type as S. hypoleucus, only a 

 little darker, but with the colours similarly distributed, and the colour also of the 

 under surface is pale reddish- white. The front of the head, from between the eyes to 

 the muzzle, the sides of the face below the ear, the sides of the neck, the chin, 

 throat and under parts, and the margin of the thigh at the groin, are reddish- white ; 

 the hairs on the light area of the head having dark-brown tips. The general colour 

 of the upper parts is a rich reddish-brown, the hair showing a distinct tendency to 

 annulation in the formation of a narrow, pale yellowish, sub-apical band with a 

 brown tip. The colour gets darker and more chestnut along the line of demarcation 

 from the white of the under parts, and along the margins of the limbs and on the 

 lower part of the hind leg. The basal half of the hairs of the tail is yellowish- white, 

 and the remainder, dark reddish-brown, darker than the body and more brown. The 

 moustachial and other bristles are black, and the body-bristles, orange-brown. The 

 mesial line of the tail is concolorous with the under parts, but the short, mesial hairs 

 are darker. 



I have examined the type of S. ephippium and numerous other specimens, 

 all from Borneo, the majority having been obtained in the north part of the island. 

 The ears are not pencilled as in Bornean examples of S. gigantem. The tail 

 is considerably longer than the body. The general colour of the upper parts 

 is dark, rusty brown, but a broad, darker area runs, from near the nape, along the 

 middle line of the back to the tail. In some, this dark colour is restricted to the 

 hinder half of the body, while, in others, it is entirely absent. The rest of the 

 upper surface of the animal is grizzled, and the dorsal, dark list gradually passes 

 externally into the colour of the sides. The sides of the face and neck, and the 

 chin and throat, are always,, more or less, rather bright ferruginous, which may or 

 may not extend on to the outer surfaces of the fore limbs. All the rest of the 

 under parts and the inside of the limbs are white, more or less tinged with yellowish, 

 or with pale ferruginous on the chest and on the middle of the belly. Such is 

 the general distribution of colour, but the animal is subject to marked variations. 

 Occasionally the head is wliitish-grey, and the dark list is reduced to a deep brown 

 area on the hinder quarters, the limbs being pale-yellow and the white on the 

 front of the tliighs well defined. The tail is uniformly brownish-black, paling at 

 the tip to yellowish-brown. The sides of the neck, the shoulders, and flanks are 

 orange-yellow. The chin, throat, and chest are pale orange ; the belly white. This 

 variety leads dii-ectly into S. hypoleucus from Java, Sumatra, Malacca, and the 

 Celebes, and through it into aS'. bicolor var. sondaica, Horsfd., which is the >S'. 

 aurivente7\ Is. Geoff. 



The skull of .S'. bicolor is very much smaller than the skull of S. giganteus, 

 an adult skull of theformer measuring only 2"- 5 6 to 2"-97 the length in ^. gigantem 



^ Ann. and Mag. Nat. Hist. 1867, p. 276. 



