I.jS On MiiDimdl.s from the Edstcrn Desert of Ejijjit. 



"Wings to the base of the toes. Post-calcareal lobule very 

 iianow. Tip of tall little projecting. 



Skull, as compared with that of P. tianus, similar in size, 

 but with a broader, flatter muzzle and smaller brain-case. 

 IMedian palatal s))ine less developed. Base of skull between 

 bulli\? conspicuously narrower. 



Incisors slender, conical, unicusjiid terminally, though each 

 lias a minute basal cusplet on itscingulum behind ; the outer 

 two thirds the height of the inner. Small upper premolar 

 unusually minute, hidden in the inner angle between the 

 closely adpressed canine and large premolar, and lower than 

 their cingula, so as to be quite invisible from without. 

 Lower incisors trifid, overlapping, subequal in horizontal 

 length, but the outer pair slightly thicker than the others. 

 Anterior lower premolar two thirds the height of the second, 

 small in section, the canine and large premolar almost touching 

 each other on its inner side. 



Dimensions of the type (the measurements in inverted 

 commas taken by the collector in the flesh) : — 



Forearm 30 mm. 



"Head and body 34"; "tail 34"; 'Miind foot 5"; 

 "car 10"; tragus on inner edge 3*1; third iinger, meta- 

 carpus 27, first phalanx 9"3, second phalanx 10; fifth finger 

 3(5; tibia 12-5. 



tSkull : greatest length 11*3 ; basal length in middle line 

 8*4 ; breadth of brain-case .'j'O ; front of canine to back of 

 7)1^ 3*7 ; least breadth of basioccipital between bulhe 0'() 



IM>. Eastern Egyptian desert, lat. 22^" N., long. 35° E. 

 Alt. 2000 feet. 



'J]/pe. Adult female. Oiiginal number 28. Collected 

 12th August, 1903. Two specimens. 



This most interesting little bat is widely different from 

 any species yet described, the proportions of its upper incisors 

 distinguishing it at once from most members of the genus. 

 Its anterior upper premolars are so minute that they would 

 probably be overlooked by any worker only examining spirit- 

 specimens; but there is no recorded " Vespertil'w" of so small 

 a size in Egypt. 



Dipodillus MacldlUylm, sp. n. 



A pencil-tailed species similar to D. famulus, Thos., but 

 smaller. 



Size small. Fur of medium length, hairs of back about 

 9-10 mm. long. General colour above pale fawn, finely 

 washed with black, the dorsal hairs each with a fawn sub- 

 terminal ring and a black tip ; sides of a warmer fawn, 



