348 bulletin: museltm of comparative zoology. 



with our specimen, which in lack of evidence to the contrary, may 

 stand for the present as a full species. The subspecies fuscatus is 

 described as dark smoky brown above, scarcely lighter below and 

 without a white edging to the membrane, so is a very different animal. 

 The inner upper incisor in P. marginatus is strongly bifid, and about 

 twice the height of the outer. The first upper premolar is minute, 

 not exceeding the cingulum of the canine, hence is invisible externally. 

 It is not present on the left side of our specimen. The greatest length 

 of the skull is 11.8 mm., of the tooth row, back of upper third molar 

 to front of canine 4. 



Eptesicus phasma G. M. Allen. 

 Ghost Bat, 

 Eptesicus phasma G. M. Allen, Bull. Mus. comp. zool., 1911, 54, p. 327. 



Five specimens of this white-^\■inged species were collected at various 

 points along the Blue Nile (Roseires, El Garef, Magangani) where it 

 appeared to be fairly common. It commences to fly at dusk, and 

 usually keeps fairly low, even coming close to the ground. More 

 than once I knocked one dowTi wdth a stick as it flew near me. 



I have compared the specimens with the original series from British 

 East Africa and do not find them essentially different. 



Eptesicus mixutus somalicus (Thomas). 

 Northern Little B^o^^^l Bat. 



Vespertilio 77ii7iutus somalicus Thomas, Ann. mag. nat. hist., 1901, ser. 7, 8, p. 32. 



A single specimen of this species was obtained at Bados on the Blue 

 Nile, as it was flying about at the edge of a great marsh at dusk. 

 Although in its present condition it is impossible to be certain of its 

 color, it seems less palhd below than Thomas describes for the type 

 from Somaliland; the interfemoral membrane is prominently edged 

 with whitish, which is given as one of the characters separating it 

 from typical minutus of South Africa. 



