ORIENTAL FLYING SQUIRRELS. 1017 



1859. Pteromys cineraceus. Blyth, J. A. S. B., XXVIII, p. 276. 



Description. — Fur of back 35-40 mm. long. General colour 

 above drab, grizzled with buffy white, much more finely so than in 

 any other in this group, below white. Individual hairs of back 

 basally ' fawn colour ' (25 mm.), then vandyke brown with a sub- 

 terminal white ring (3-5 mm.). Face like back but finer in pattern, 

 cheeks and chin fawn colour. Forearm with a hazel tinge extend- 

 ing on to hands, feet black-brown. Tail grey throughout. 



Size. — Head and body, 463 ; tail, 565 ; hindfoot, 84 ; ear, 40. 

 Skull, greatest length, 80 ; basilar length, 63 ; greatest breadth, 

 53 ; molars, 17*5. 



Remarks. — This species was recorded by Blyth from Arakan 

 and Tenasserim. I have only seen 2 specimens from the latter 

 locality. Probably when more material is available, it will be 

 found that cineraceus is allied to yunnanensis and lylei much as 

 lanJca is to philippensis. It is difficult to imagine how it can be 

 directly connected with those forms bounded as it is on the north 

 and south by members of quite other groups. 



(4) Petaurista lanha, sp. n. 



A Petaurista in size and pattern quite like true philippensis, but 

 entirely lacking the rufous tinge so characteristic of the latter 

 species. 



Fur of back 40-45 mm. long. General colour rusty black much 

 washed with white, below greyish white (the individual hairs have 

 short pale grey bases). Individual hairs of back basally ' mouse 

 grey' (35 mm.) remainder white with black tips. Face and cheeks 

 like back, but the pattern much finer. Hands and feet black. 

 Tail dark. 



Dimensions of the type. — Head and body, (c) 460 ; tail, (c) 560 ; 

 Hindfoot, 85 ; ear, 43. .Skull, greatest length, 77; basilar length, 

 60; greatest breadth, 48; molars, 17. 



Habitat. — Ceylon. 



Type.— Adult male. B.M. No. 96, 3, 27, 1. Collected and 

 presented to the National Collection by C. B. Horsbrugh, Esq. 



Remarks. — Three specimens examined. The characters are 

 very constant and the individuals are at once recognisable by their 



