272 I)r. J. E. Gray's Si/nopsis of the Asiatic Squirrels 



and closely longitudinally grooved. The limbs free ; feet large, 

 strong. Tail as long as the body and head, very thick, clavate, 

 covered with long flaccid hairs. 



The grooving of the teeth is a peculiarity not observed in any 

 other Sciuridse. 



Rheithrosciurus macrotis. 



Sciurus macrotis, Gray, P. Z. S. 1856, p. 341, t. 46. 



Brown, very minutely punctulated; throat and beneath white; 

 lateral streaks broad, yellowish; front of thighs bay. Tail 

 blackish, whitish-washed. 



Hub. Sarawak (Wallace). Type in B.M. 



II. The front edge of the cutting-teeth yxarrow, compressed, smooth. 

 2. Sciurus. 



Jlead moderate, short, rounded; ears ovate, covered exter- 

 nally with elongated hairs forming a tuft or pencil ; frorit edge 

 of the cutting-teeth narrow, compressed, smooth. Limbs free. 

 Tail as long as or longer than the body, covered with long hair 

 spreading on the sides. 



I. The ears with a tuft of elongated rigid hairs forming a trans- 



verse pencil. No. 1. 



II. The ears with rather rigid hairs forming a fringe and slight 

 pencil. Nos. 2-4. 



III. The ears with a jmff or tuft of soft hairs on the outer sur- 

 face. Nos. 5-9. 



I. Ears with a tuft of long hairs forming a pencil; tail broad, as long 

 as the body; medium-sized. 



1. Sciurus cnlotus. 



Mustelal calotus, or ChuaJckal, Hodgson, Calcutta J. N. H. ii. 221, t. 9. 



Mustela calotis, Hodgson. 



Sciurus europcEus, var. Gray, List. Hodgs. Coll. 23. 



Fur very soft, black-grey, beneath white ; tuft of ears and 

 tail darker. 



Hab. North China, Thibet (Mr. Hodgson's type), Siberia. 

 B.M. 



This may he the same as the Grey Squirrel of Northern Eu- 

 rope; but it is smaller and the fur softer than any 5. vulgaris I 

 have seen. 



H. The ears covered externally with elongated hairs forming a fringe 

 and slight pencil ; medium-sized. 



2. Sciurus leucomus, Sol. Miiller, Yerh. N. B. 10. 



Dark grey, grizzled with black and white; beneath reddish 

 grey, white half collar on the back of the neck. Tail as long 



