ALLEN: MAMMALS FROM THE BLUE NILE VALLEY. 347 



of which was from Keren, Erythrea. In contrast to the tree inhabited 

 by the Dohson's Leaf-nosed Bats, this was well lif^hted by two larjije 

 openings in the massive trmik, and the bat hung in the shade against 

 the inner wall. The forearm measurement is 48, which as Andersen 

 points out, is slightly greater than in the race andersoni from the east- 

 ern desert region of Egypt. The skull is decidedly longer, 21.2 mm. 

 from occiput to front of canine instead of 19, but the lower tooth row, 

 back of last niolar to front of canine, measures the same in both, 8.3 

 mm. In all four specimens of R. a. andersoni examined by Thomas, 

 the minute anterior premolars, (considered by Andersen to be p^ and 

 P3 in upper and lower jaws respectiveh'), were quite lacking and the 

 same is true of the type and topotype of R. acrotis according to Ander- 

 sen. In the specimen from Magangani, however, the minute p- of 

 the upper right-hand series is present as a mere spicule in the outer 

 angle between the canine and the large premolar. In the related R. 

 clivosus the small anterior premolars are said to be present. 



Peters, in 1859, described a species of Rhinopoma from the Blue 

 Nile, but no specimens seem to have been recorded in more recent 

 times. Heuglin and Fitzinger also name a species of this genus from 

 Sennar, but it may be that the generic reference was erroneous. We 

 did not find the genus except in Egypt where it is well known. 



PiPiSTRELLUS MARGINATUS (Cretzschmar). 



Marginated Pipistrelle. 



Vespertilio marqinatus Cretzschmar, Riippell's Atlas reise nordlichen Afrika. 

 Saugeth., 1826, p. 74, pi. 29, fig. a. 



But a single Pipistrellus was obtained, an adult female at El Garef, 

 on the Blue Nile. It was knocked do^^^l with a stick as it flew past 

 near the ground. In general appearance it much resembles P. kuhli 

 of Europe, not only in color of the fur but in having a dull whitish 

 border to the interfemoral membrane. It is smaller, however, with a 

 forearm of only 30 mm., against 35 in specimens of kuhli from Italy, 

 wath which I have compared it. In color and size it differs from P. 

 kuhli fiiscatus described by Thomas from Xaivasha, British East 

 Africa, but appears to be identical with Cretzschmar's I'espcrtiUo 

 marginatus, currently placed as a sNuonym of P. kuhli. The forearm 

 of marginatus measures 30 mm. in Cretzschmar's plate, and so agrees 



