Sciurus caniceps and allied Species. 271 
Scturus caniceps, Gray. 
Scrurus caniceps, Gray (nec Temm.), Ann. & Mag. Nat. Hist. x. 1842, 
p- 263; Thos. P. ZS. 1886, p- 68; Anders. Zool. Res. Yunnan, 
p. 229 (1879) ; Blanford, Faun. Br. Ind., Mamm. p. 380 (1891) ; 
W.L. Sclater, Cat. Mamm. Calc. Mus. ii. p. 18 (1891). 
Serurus ehrysonotus, Blyth, J. A. 8. B. vol. xvi. 1847, p. 873, pl. xxxvii. 
This species, although closely allied to Sc. concolor and 
Se. epomophorus described in this paper, 1s quite distinct 
in having a breeding-pelage, which is assumed during the 
winter months, being at its brightest in January. It ranges 
throughout Burma and Tenasserim, spreading eastwards 
into Siam, and being found as far south as Bankok in the 
native State of Patelung, although I know of no instance 
of its occurrence on the western side of the peninsula, 
In its dull pelage, which is worn from March to November, 
it is of a uniform grizzled grey, lighter on the underparts, 
top of the head, and feet. The tail is similar in colour to the 
back, and shows, especially towards its tip, annulations of 
black and grey. ‘The tip itself is black. Hach hair above 
is dark at its base, with three or four light annulations, while 
those below have dark bases and light ashy-grey tips. 
In its bright pelage the underparts, limbs, feet, tail, sides 
of the face, and top of the nose are unchanged, but the rest of 
the pelage, which includes all the upper parts, becomes of a 
deep rufous orange, each hair being black at its base with a 
deep rufous tip. The change, which takes place by moult 
and not by a change of colour, is undergone equally by both 
sexes, and takes place, I believe, during the rutting-period. 
In the bright pelage Sc. caniceps is quite distinct from all 
other species, and there can be no risk of confusion; but in 
the dull pelage it bears a considerable likeness to Se. concolor 
and Se. epomophorus Davisont, 'Vhe latter, however, may 
always be distinguished by its much darker colour, the 
presence of a pateh of very pale rufous on the underparts at 
the base of either thigh, and a similar very pale rufous patch 
on the sides of the neck below the ear. Sc. concolor is distin- 
guished by the annulations on the hairs of the back being of 
varying degrees of ferruginous, instead of pale ashy. ‘I'he 
hairs on the ears are also rufous, which is never the case in . 
Sc. caniceps, and the long black hairs at the tip of the tail have 
fulvous ends, which latter characteristic will serve to distin- 
guish Se, concolor from all the other species except pygery- 
thrus and griseamanus., ‘There is no risk of confusing the most 
vividly markec specimens of Se. concolor with the bright 
pelage of Sc. caniceps, for the hairs of Se. concolor are e always 
[9* 
