32 MAMMALIA. 



Sciurus levaillanti, Kuhl Beitr. Zool., p. 67 (1820). 

 Sciurus ocularis, Smith Zool. Journ., iv, p. 439 (1829). 



Sciurus setosus, Smuts Enum, Manirn. Capens., p. 33 (1832) ; Blyth Cat,, 

 no. 346, p. 108. 



Distribution. — South Africa. 



a. Stuffed South Africa E. L. Layard (1859), A.S.B. 



Genus PTEROMYS. 



Pteromys, G. Cuvier Tableau Gen. in Lefons d'Anat. Camp., i, tabl. i 

 (1800)*. 



The following key is constructed to enable the reader to dis- 

 tinguish the typical forms only. All the species of this genus resem- 

 ble one another so closely and so run into one another that it is 

 impossible to construct a key into which every specimen will fit. 



Key of the Indian Species. 



a. Dorsal surface dark brown or black ; no tinge of reddish, 



h. Hairs of dorsal surface but slightly tipped with white. 



P. oral, p. 33. 



h^. Hairs strongly tipped with white, giving the dorsal surface a 

 hoary grizzled appearance. P. cineraceus, p. 33. 



a^ Dorsal surface with a reddish or yellowish tinge, never black 

 or brown. 



c. No shoulder patch; dorsal surface comparatively uniform. 



d. Fur of dorsal surface red, with well-developed white tips 

 producing a hoary red appearance; tail longer than 

 head or body . . P. alborufus, p. 34- 



d^. Fur of dorsal surface dark maroon with but slight 

 traces of the white tips to the bsirs. 



P. yunnanensis, p. 35. 



d^ . Dorsal fur grizzled gray, more reddish on the para- 

 chute, tail shorter than the head and body together, 

 body about 16, tail about 12 inches. 



P. albiventer, p. 35. 



c^. Dorsal fur generally dark maroon and forming a strong 

 contrast to that of the shoulders and parachute, which 

 is yellow, usually but slight traces of grizzling. 



P. magnificus, p. 35. 



c^. Resembling P. albiventer, but somewhat smaller (body 

 about 13, tail about 13 inches), with the top of the head 



