120 
THE MAMMALS OF EGYPT. 
be regarded as specifically identical with the three Siwah specimens and with 
M. Lataste’s male from Ourgla in the Algerian Sahara. 
I am indebted to Professor Lorenz for the information that the type of Plecotus 
ustus, Heuglin, preserved in the Vienna Museum is a specimen of this species from 
Wadi Haifa. 
The British Museum has received, in alcohol, a female of this genus from Fao, in 
the Persian Gulf, which differs in some respects from the North-African and 
Himalayan representatives of the genus. A figure of this specimen has been given 
for the purpose of comparison (Plate XVIII. fig. 3). 
The muzzle is broad and abruptly truncated in front, shelving downwards and 
backwards, without any mesial depression or furrow above the upper lip, and the 
nostrils are only slightly projected forwards beyond their outer margin, but are not 
separated by a mesial furrow. The ears also are somewhat shorter than those of 
0. hemprichi, and the tragus when laid forwards falls considerably short of the 
nostrils. This bat is thus distinguished from 0. hemprichi^ and the modifications 
it offers are more than can be legitimately ascribed to individual variation ; beyond 
the differences already mentioned, its first digit, including its metacarpal, is somewhat 
longer than that of 0. liemprichi. This individual from the Persian Gulf seems to 
represent a local race, which may be indicated as 0. petersi, sp. nov. 
