104 Journal of the F.M.S. Museums. [Vol. VII, 



(For detailed measurements see p. 105. 

 Specimens examined: — Twenty-six, all from the type 

 locality. 



Key to the Local Malayan Races of 

 Fomeutes tenuis (Horsf.). 



A. Larger forms; total length of skulls never less than 39 

 mm. 



a. Larger, much more greyish 



beneath, ochraceous yellow 

 patch on outer aspect of thighs, 

 strongly marked ... ... T. tenuis tahan. 



a 1 . Smaller, more yellowish buff be- 

 neath, ochraceous yellow patch 

 on outer aspect of thighs only 

 slightly marked ... ... T. tenuis gunong- 



B. Smaller forms; total length of skull nevermore than 37.5 



mm. 



b. Richly coloured forms: shoulder 



and thigh patches, strongly 

 marked ; hands and feet bright 

 ochraceous buff ... ... T. tenuis tenuis. 



b'. Dull coloured 'forms; shoulders 



and thigh patches not strongly 



marked; hands and feet dull 



olivaceous buff. 



c. Black element in pelage of tail 



much reduced ... ... T.tenuissordidus. 



c l . Black element in pelage of tail 

 normal. 

 d. More ochraceous above, ter- 

 minal whitish tips to tail 

 hairs well marked ... '/'. tenuis surdus. 



i/ 1 . More olivaceous above, ter- 

 minal whitish tips of tail 

 hairs reduced ... ... 7". tenuis tiom- 



aniciis. 



