242 EODENTIA. 



Sciurus rufogaster, Gray^ Ann. and Mag. Nat. Hist. vol. x. 1842, p. 263; Hand-List Mamm. 



B. M. 1843, p. 142; Blyth, Journ. As. Soc. Beng. vol. xxiv. 1855, p. 473. 

 Macroxus rufogaster, Gray, Ann. and Mag. Nat. Hist. vol. xx. 1847, p. 283. 

 Macroxus rufogaster, var. borneoensis. Gray, Ann. and Mag. Nat. Hist. vol. xx. 1867, p. 283. 



This well-marked species approaches S. erythrcEus in size. The lower parts 

 and inside of the limbs are deep ruddy ferruginous ; the head, sides of neck, shoulder, 

 outside of fore limb, thigh and outside of hind limb, being minutely speckled 

 with white on a blackish ground ; feet black, the rest of the upper parts of the body 

 with the base of the tail yellowish-rufous, punctulated with yellow and black ; tail 

 bushy and black ; whiskers black. The specimen in the British Museum referred by 

 Dr. Gray to S. rufogaster var. borneoensis, differs from Malayan specimens in having 

 portions of the upper parts unannulated and of deep rich chestnut, which embraces 

 the upper surface of the base of the tail and is concolorous with the chestnut of the 

 under parts. This, however, is evidently not a persistent form, because I have 

 seen a specimen from the same island in which the red portion of the upper parts 

 is grizzled and much of the same tint as Malayan individuals, except in the mesial 

 line of the neck and back, where the colour is rich red-brown, extending along 

 the dorsum of the tail for about three inches. 



Miiller and Schlegel mention a variety that I have not seen, and of which they 

 state that the red colour of the under parts extends to the heel, the fore foot and 

 the toes, while the colour of the upper parts passes into a uniform, lustrous black. 

 They also remark, however, that the back not unfrequently assumes a pale yellowish- 

 brown tint. 



In the skull the orbit is rather large, and the muzzle is so contracted at its base 

 that the extremity is but httle narrower. 



This species was stated by Is. Geoffroy to have been described from a specimen 

 obtained in Java by Diard, and this type I have examined. It also occurs in the 

 Malayan peninsula and Sumatra, but Schlegel and Miiller likewise record it from 

 Canton. 



The squirrel observed in Assam by M'CleUand, and referred by him to this 

 species, was another allied form, S. erythrceus. Blyth was inclined to regard 

 the S. castaneoventris. Gray, as the young of S. hippmnis, but in this he was 

 mistaken, as the two are quite distinct. 



* Sciurus sladeni, Andr. Plate XX. 



Sciurus sladeni, Andr. Proc. Zool. Soc. Lond. 1871, p. 139; Blyth, Journ. As. Soc. Beng. vol. xliv. 

 1875, ex. no. p. 37. 



This species equals S. gordoni in size, to which it is closely related, but from 

 which, as far as our present knowledge goes, it is distinguished by its orange-red head, 

 and feet, and by the bright brick-red tip to its tail ; the colour of its under parts is 

 the same as in S. gordoni, and they are concolorous with the head and feet. No 

 ventral, grizzled line. The upper parts are grizzled rufous-olive and the annulation is 



