44 MR. 0. BODEN KLOSS ON 



yellow Giant Squirrel from Plirabat, and observed anotbei* near 

 Pakiiani Kabin which he believed had tufted ears. This feature 

 would apparently indicate the presence near Bangkok of Rattifa 

 glgcdntea McClelland, which, according to VV^roughto]! (Journ. 

 Bombay Nat. Hist. Soc. vol. xix. p, 890, 1910), also occurs in 

 JST. Siam. It is a large black-and-buft' a.nimal (head and body 

 417 mm., hind foot 87, skull 80), with the yellow on the fore 

 limb confined to the inner side. 



17. Ratufa melanopepla sinus, subsp. n. 



Type. Adult female (skin and skull). No. 1733/C.B.K. 

 B.M. No. 15.11.4.41. Collected on Koh Kut Id., S.E. Siam, on 

 26th December, 1914. 



Characters. — Like R. m. peninsulce Miller, but uniform black 

 above with the under siu'face rather more ochraceous and ex- 

 tending slightly to the upper surface of the hind foot, while the 

 yellow of the fore limb extends to the base of the toes above. 

 Nasals rather longer. 



Colour. — Upper surface and entire tail clear black. Under 

 sui'face varying from ochraceous buff to ochraceous orange and 

 ochraceous tawny in centre of abdomen. Cheeks to base of ear, 

 sides of neck, and upper and inner side of fore limbs pale orange- 

 yellow, deeper on the inner side of fore limbs, A small area of 

 ochraceous buff on the outer and upper sides of the hind foot. 

 Sides of muzzle like throat, but chin black, 



Skidl and Teeth. — Resemble those of B. m. peninsidee and 

 li. m. leucogeiiys, except for the greater length of the nasals, the 

 posterior terminations of which are more in lizie with those of 

 the premaxillaries. The bullae are apparently a little shorter 

 and broader. 



Measurements. — Ears of the type 30, of the series 27-30 mm. 

 For other measurements see table, p. 69. 



Specimens examined. — -Six adults, 3 males and 3 females. 



Remarks. ^T\ds form differs from that of the adjacent main- 

 land in being uniformly clear black above without any nuchal 

 spot. The yellow areas are deeper in shade, those of the head, 

 neck, and fore limbs being of about the same tone as the abdomen 

 of R. VI. leucogenys, while the patch of yellow on the upper side 

 of the hind foot is smaller and somewhat disconnected from the 

 yellow of the thigh. 



This and the preceding race both differ from the Peninsular 

 form in the constant presence of a considerable amount of yellow 

 on the hind and fore feet. Inter se, the differences in colour are 

 very marked, though those of the dorsal surface may be only 

 seasonal. Size is about the same in all (a trifle larger in the 

 S.E. Siamese forms), but the longer nasals of the island race 

 further serve to distinguish it from both the others. 



It may be pointed out that the forms from the islands of the 

 Malayan part of the Peninsula (Teratau, Langkawi, Penang, and 

 Tioman), i. e., southern island forms, are all instantly separated 



