560 Mr. 0. Thomas on 



skull, distinctly larger. Colour apparently, judged by spirit- 

 specimens, very much as in R. jloweri above, but the whole 

 under surface is entirely white, while in the type of R. jloweri 

 it is buffy, "light buff" posteriorly, and "warm buff" on 

 the throat and chest. 



Skull much larger than in R. Jloweri^ the muzzle less 

 shortened in proportion to the brain-case. 



Dimensions of the type (measured on the spirit-speci- 

 men) : — 



Forearm 40 mm. 



Head and body 45 ; tail 36 ; ear 12*5 ; third finger, meta- 

 carpal 36'5, first phalanx 11*5; lower leg and hind foot 

 (c. u.) 12. 



Skull : greatest length 135 ; condyle to front of canine 

 12*9 ; zygomatic breadth 9 ; interorbital breadth 4*6 ; inter- 

 temporal breadtli 3 2 ; palato-sinual length 5*3 ; front of 

 canine to back o£ m^ 5. 



Hah. Sudan. Type from the Blue Nile, 20 miles above 

 Sennar. 



Type. Adult male. B.M. no. 15. 3. 6. 70. Collected 

 13th December, 1913, by Willoughby P. Lowe. 



Mr. Willoughby Lowe obtained five specimens of Rhino- 

 2'>terus at different localities on the Blue and White Nile. 

 On examination of the skulls these prove all to belong to a 

 larger form of the genus than R. Jloweri, living side by side 

 with the latter in the same area — a phenomenon not unusual 

 with the smaller bats. The Rhinopterus obtained by Dr. A. F. 

 W^ollaston at Shendi, and referred to in Anderson and 

 de Winton's * Mammals of Egypt,* also belongs to this 

 larger form. Whether the difference in the colour of the 

 under surface is constant remains to be seen. 



Glauconycteris phalcena, sp. n. 



Near G. variegata, but teeth smaller and incisors more 

 slender. 



Size as in G. variegata. Colour, of a spirit-specimen, 

 apparently about as in that animal, the head and belly 

 similarly whitish, but the back hardly so strongly buffy. 

 The colour is therefore still further fiom that of the neigh- 

 bouring G» variegata papilio *, in which both head and belly 



* I use tliis term for my Glauconycteris papilio, as I do not now think 

 it should be specifically distinguished from variegata. The latter, how- 

 ever, in nature would simply appear to be a Uamara desert race of the 

 widely spread (Gambia to Beira) pninlio, though the rules of nomen- 

 clature necessitate our putting the name the other way about. 



