ALLEN: MAMMALS FROM THE BLUE NILE VALLEY. 347 
of which was from Keren, Erythrea. In contrast to the tree inhabited 
by the Dobson’s Leaf-nosed Bats, this was well lighted by two large 
openings in the massive trunk, 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 molar 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 respectively), 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 marginatus Cretzschmar, Riippell’s Atlas reise nérdlichen Afrika. 
| Saugeth., 1826, p. 74, pl. 29, fig. a. 
| But a single Pipistrellus was obtained, an adult female at El Garef, 
. on the Blue Nile. It was knocked down 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, 
with which I have Facpared it. In color and size it differs from P. 
| kuhli fuscatus described by Thomas from Naivasha, British East 
Africa, but appears to be identical with Cretzschmar’s Vespertilio 
marginatus, currently placed as a synonym of P. kuhli. The forearm 
i > . 
_ of marginatus measures 30 mm. in Cretzschmar’s plate, and so agrees 
