262 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXI. 



Sciiirus -melanops, jS. rajjiesi, and S. harrisoni.,"' form a section of the 

 prevost/'l group characterized by the dark-grayish or blackish cheeks 

 with conspicuous white patch on muzzle at base of whiskers and smaller 

 white spot below eye at base of cheek bristles. From each other they 

 are distinguishable as follows: 



KEY TO SPECIES. 



Manyliairsof the tail with whitish subterminal riiio;3-4 mm. in width., S'. Iidrrisoni 

 Tail not grizzled except occasionally at extreme base below. 

 Shoulder concolor with outer surface of upper arm: 



H ind fo( )t about 56 ( 53 ) ; shoulder chestnut .S'. rafflesi 



Hind foot about 60 (56) ; shoulder orange-ochraceous *S^. inelanops 



Shoulder much lighter than outer surface of upper arm; more white than 

 black in grizzle on sides of neck; shoulder distinctly washed with red- 

 dish >S'. carmhmensis 



More black than white in grizzle on sides of neck; shoulder scarcely 

 washed with reddish S. condureims 



Measurements of Sciurus carimonensis and S. condurensis from the Rhio-Llnga Archipelago. 



"Type. 



SCIURUS TENUIS Raffles. 



1900. Sciarus tciruis Millkr, Proc. ^yashington Acad. Sci., II, p. 221, August 20, 

 1900. 



The specimen that Doctor Abbott procured on his first visit to Linga 

 is the only one that he has taken in the archipelago. 



« Stone and Rehn, Proc. Acad. Nat. Sci. Philadelphia, 1902, p. 132, June 4, 1902. 

 (Goenong Stegi, Lampong District.) I am indebted to Mr. Witmer Stone and the 

 authorities of the Academy of Natural Sciences of Philailelphia for the opportunity 

 to examine the specimen on which this name was based. I have also examined the 

 type of Sciurus rajflesi in the British Museum. 



