392 Blr. 0. Thomas on 



27°-28°, in the region where tlie upper waters of the Irra- 

 wadcly, the Salween, the Mekong, and the Yang-tse approxi- 

 mate to each other and form a remarkable district o£ alter- 

 nating mountains and valleys perhaps unequalled for diversity 

 of surface in any part of tlie world. Mr. Forrest has been 

 collecting plants iu this area for some time, and in 1918 had 

 obtained a few n)ammals, among wliich were the two new 

 forms of Tamiops described by me in 1920''*'. Col. Clarke 

 was then good enough to influence Mr. Forrest to turn his 

 attention to small ummmals, and in the collection of these, as 

 of birds, he has proved to have great abilities, so that the 

 ])resent set is one of the most interesting collections that the 

 Museum has received for many years. Geographically it 

 fills a very important lacuna between the collections made in 

 Northern Burma on behalf of the- Bomi)ay Natural History 

 Society and those obtained by Mr. Malcolm Anderson in 

 Sze-chwan when carrying out the Duke of Bedford's explo- 

 lation of Eastern Asia. 



Isolated collections have also been made in this area by 

 Mr. E. B. Howell and Mr. F. Kingdon Ward, and to them 

 we owe the first discovery of several of the smaller forms 

 now sent by Mr. Forrest. 



The whole collection consists of nearly 250 sf)ecimens, of 

 which about 100 are voles, and have been reserved for a 

 separate paper by my colleague Mr. Hintoji. The remainder 

 belong to 32 species, including 7 now described as new. 



Of these novelties, one is an exce))tionally beautiful Flying- 

 squirrel, which I have named in honour of the donor, and 

 another forms a new genus of Sciuridse, and is therefore of 

 great zoological interest. The specimens of a new species of 

 a Uropsiline Insectivore are also especially welcome. 



1. Barbaslella darjelingensis, Hodgs. 



S . 470. Wei-Hse Valley, 27° N. 7000-8000'. 



2. Tadarida teniotis ccecata, subsp. n. 



S. 403. Mekong Valley, 28° 20'. 7000'. 29th Sep- 

 tember, 1921. B.M. no. 22. 9. 1. 2. Tt/pe. 



Quite similar in size and general characters to true teniotis, 

 l)ut colour nnich darker. Upper surface uniform daik 

 " mummy-brown," the extreme bases of the hairs only whitish. 

 In Portuguese and Egyptian specimens the general colour is 

 more or less drab. Under surface very slightly paler. 



Skull and teeth as in teniotis. 



• Ann. & Mag. Nat. Hist. (9) v. p. 304 (1920). 



