A COLLECTION OF MAMMALS FROM SIAM. 19 



Sriiini.^ chnisomitus, rjlytli, Jnurn. Asiat. Soc. BiMigal, XVI, ii.S73, 

 pi. XXXVII, Hg 1 (1847) : Teteis, P.Z.S., 186G, p. 42P. 



2 9 adults, 1 2 jiiv., Krabiii, Central Siain. Nov. 1915. [Nos. 

 2043, 2044, 2049]. 



This squirrel, which in its summer pelage somewhat resembles 

 races of S. concolor from Peninsular Siam, is represented in this collec- 

 tion by individuals in slightly varj'ing stages of the very striking 

 winter coat. 



The whole of the upper surface is rich Mars yellow, the hairs 

 slightly tipped with black except on the limbs, muzzle and ears. The 

 yellow extends some distance down the base of the tail and less strong- 

 ly over the head and sides of the neck. The limbs are grizzled black 

 and white, muzzle and fore-feet are greyish white and the hind-feet 

 silvery white. The undersurfsrce varies from whitish to pale grey, and 

 there is a median stripe of yellowish grey. The tail is coarsely banded 

 black and white with a sharply defined pure black tip. 



The J'oung animal is rather interesting, for though it retains in 

 part its milk dentition, i% yet possessesythe winter pelage though not 

 (]uite to the same complete degree as do the adults. 



The winter coat first shows about the end of September as 

 yellow patches on the back ; while the summer pelage commences 

 about March with grey patches in the golden area until a coat of uni- 

 form grizzled grey, lighter on the under parts, top of head and feet, is 

 arrived at. 



These squirrels are Blyth's S. chri/sonotus of Tenasserim, with 

 the types of which I have compared them, and though Gray's S. cani- 

 cejis was said to have come from Bhutan (where no sucli squirrel 

 occurs), there is no doubt but that the name should apply to these 

 animals and, being the oldest, must therefore be used. 



I would venture the suggestion (though 1 have not seen them) 

 that the squirrels from North Siam described by Eobinson and 

 Wroughton (Journ. Fed. Malay Stales Mus., IV C1911), p. 233) under 

 the name of -S. cpomopliorus jluniinalis are individuals of this species 

 in dull summer pelage. 



(For measurements see table p. 30). 



VOL. n. jL'.Ni; I'Jio. 



