MAMMALS FROM SIAM. 43 



originated in the latter locality, and in the race for expansion 

 the last got left at the post. — C.B. iTJ. 



16. Ratufa melanopepla leucogenys, subsp. n. 



Sciurus javensis Grray, P. Z. S. 1861, p. 137. 



Sckirus hicolor de Pousargues, Mission Pavie, Indo-Chine, 

 Etudes Diverses, iii. p. 582 (1904). 



Battbfa melanopepla Gyldenstolpe, Arkiv for Zoologi, Band 8, 

 No. 23, p. 15 (1914). 



Type. Adult female (skin and skull), No. 1912/C.B.K. 

 B.M. No. 15.11.4.43. Collected at Leni Ngop, S.E. Siam, on 

 15th January, 1915. 



Characters. — Like R. m. peninsulce Miller (Proc. Washington 

 Acad. Sci. vol. ii. p. 71, 1900 ; id., Smithsonian Miscellaneous 

 Collections, vol. Ixi. No. 21, p. 25, 1913), but yellow of cheeks, 

 fore limbs, and under surface markedly paler than the respective 

 areas in that form, yellow on thighs more extensive and con- 

 tinued along the sides of the feet on to their upper surfaces, 

 where it occupies a considerable area, while the yellow of the 

 fore limb extends to the base of the toes above. 



Colour. — Upper surface and entire tail bi'ownish black ; a 

 fairly conspicuous russet patch on the nape. Under surface yjale 

 orange-yellow. Cheeks to base of ear, but not reaching the eye, 

 lower sides of neck, greater part of upper side of fore limb to base 

 of toes ivory-yellow, becoming cream-colour on the posteiior part 

 of the fore limb. Tlie yellow area of the under thigh continued 

 as ivory-yellow along the outer side of the foot and on to the 

 upper surface of the latter, where it occupies almost half of the 

 area between the ankle and bases of the toes. Sides of muzzle 

 like throat, but chin black. 



Skull and teeth. — -Possess apparently no constant features 

 which will separate them from topotypes of li. m. pe')iiusulce, 

 from Traug, and others from Bandon, 100 miles to the north' in 

 Peninsular Siam. On the whole, the bullte appear to be a little 

 longer. 



Measurements. — -Ears of the type 30*5, of the series 29*5- 

 30*5 mm. For other measurements see table, p. 69. 



Specimens exarnined. — Three, the type and two adult males 

 from the same locality. 



Remarks. — This race is separated from that of the Malay 

 Peninsula by its pale yellow coloration and large yellow patch 

 on the hind foot, while the yellow of the fore limb is greater in 

 extent, reaching the base of the toes. 



The individual obtained by Gyldenstolpe {loc. cit. supra) in 

 Eastern Siam, south of Korat. is, judging from its measurements, 

 of this form. Ratufa phceopepla Miller (Smithsonian Miscel- 

 laneous Collections, vol. Ixi. No. 21, p. 25, 1913), from South 

 Tenasserim should occur also in Western Siam. It is like the 

 animal of the Peninsula, but larger (hind foot 80-89, skull 74- 

 78 mm.). Flower (P. Z. S. 1900, p. 355) records a black-and- 



