EAST AFRICAN MAMMALS IN NATIONAL MUSEUM. 95 



Genus MINIOPTERUS Bonaparte. 



1837. Miniopterus Bonaparte, Icon. Fauna Italica, vol. 1, fasc. 20, under 

 V. emarginatus. (M. schreibersii.) 



Tlie African forms of this genus of bats are badly in need of careful 

 revision. The single species included in our collection from East 

 Africa is closely related to M. schreibersii of Europe. 



MINIOPTERUS NATALENSIS ARENARIUS Heller. 



Plate 10, figs. 19, 20. 



1912. Miniopterus natalensis arenarius Heller, Smithsonian Misc. Coll., vol. 60, 

 No. 12, p. 2. November 4. (Nyuki River, Northern Guaso Nyiro, 

 British East Africa; type in U. S. Nat. Mus.) 



Specimens. — Thirteen, as follows: 



British East Africa: Lake Naivasha, 8, including 6 in alcohol 

 (Heller, Mearns, Loring); Northern Guaso Nyiro Kiver, 1 (Heller); 

 Ngare Nyuki. 2, including 1 in alcohol (Heller); XJlukenia Hills, 2 in 

 alcohol (Loring). 



Tlie Naivasha Lake specimens seem to be inseparable from those 

 from the type region. The form is very close to true natalensis, but 

 is slightly darker in color (not paler, as stated in the original descrip- 

 tion). The type-specimen was captured, with specimens of Ehino- 

 lopJius, in a rock cavo. 



Family MOLOSSID.^. 



Genus CH^REPHON Dobson. 



1874. Chierephon Dobson, Journ. Asiatic Soc. Bengal, vol. 43, pt. 2, p. 144. 



(C. johorensis.) 



The species of this genus of free-tailed bats included in our East 

 African collections are all members of the '^pumilus group." The 

 exact status of these and other forms described within the group is 

 still uncertain, as the variation in pattern and extent of the white 

 markings, which have been used as specific characters, seem to be to 

 a considerable degree individual. The position and shape of the 

 small upper premolar is likewise subject to great variation in a series 

 froin one locality. 



For tables of measurements of specimens see pages 96-97. 



CH.'EREPHON PUMILUS PUMILUS (Cretzschmar). 



1826. Dysopes pumibis Cretzschmar, Riipp. Atlas Zool., vol. 1, p. 69. (Maseaua, 

 Eritrea.) 



Specimens. — Twenty-three, from localities as follows: 

 Eritrea: Massaua, 1 in alcohol (Genoa Mus.); Saaita, 4 in alcohol 

 (Raggazzi). 

 Sudan: Mongalla, 8 in alcohol (Heller). 

 Uganda : Gondokoro, 10, including 7 in alcohol (Loring). 



