90 BULLETIN 99, UNITED STATES NATIONAL MUSEUM. 



PIPISTRELLUS HELIOS Heller. 



Plate 10, figB. 13, 14. 

 1912. Pipisfrellus helios IIellrr. Smithsonian Misc. Coll., vol. 60, No. 12, p. 3. 

 November 4. (Merelle Water, 30 miles south of Mt. Marsabit, British 

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



Specimens. — Sixteen, from localities as follows: 



British East Africa : Archer's Post, 3 in alcohol (Heller) ; 

 Lakiundu River, 5, including 3 in alcohol (Heller); Merelle Water, 

 Marsabit Road, 7, including 6 in alcohol (Heller) ; Northern Guaso 

 Nyiro, I (Percival). 



Tliis bat agrees m many particulars with tlie description of Pipi- 

 streUus deserti Thomas ^ from Tripoli, which has been recorded from 

 British East Africa by Allen ^ and by Dollman.^ There are certain 

 marked discrepancies in dimensions, however, and Miller, after study 

 of the type-specimen of deserti, placed that species in the genus Scoto- 

 Z0U8.* Tnis would appear to mean that deserti has a very minute 

 outer upper incisor, whereas in helios that tooth is particularly large, 

 almost equaling in size the larger inner incisor. 



PIPISTRELLUS AERO Heller. 



Plate 10, figs. 15, 16. 

 1912. Pipistrellus aero Heller, Smithsonian Misc. Coll., vol. GO, No. 12, p. 3. 



November 4. (Mount Gargues. Mathews Range, 7.000 feet, British Eaat 



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

 1917. Pipistrellus nanus Allen, Bull. Amer. Mus. Nat. Hist., vol. 37, pp. 441, 



442. September 29. 



Specimens. — Five, including two in alcohol, as follows: 



British East Africa : Mount Gargues (Heller) . 



HeUer notes that this species was seen only in the heavy forest on 

 the summit of Mount Gargues, 7,000 to 7, 100 feet altitude. Numbers 

 were seen at dusk every evening, but no other species was noted at 

 so high an elevation. 



PIPISTRELLUS KUHLII FUSCATUS Thomas. 



1901. Pipistrellus Icuhlii /meatus Thomas, Ann. and Mag. Nat. Hist., eer. 7, vol. 8, 

 p. 34. July. (Naivasha, British East .Vfrica; iy^Q in British Museum.) 

 1910. Pipistrellus kuhlii fuscatus Roosevelt, African Game Trails, Amer. ed., 

 pp. 474 and 480; London ed., pp. 486 and 491. 



Specimens. — Five, from localities as follows: 



British East Africa: Engare Narok River, 1 (Loring); Kabalolot 

 Hill, Sotik, 1 in alcohol (Heller); Lake Naivasha, 2, including 1 in 

 alcohol (Mearns, HeUer) ; Nairobi, 1 (Heller). 



PIPISTRELLUS rOpPELH (Fischer). 



1829. V[espertiUo] rilppelii Flscher. 8yn. Mamm.. p. 109. (Dongola. Sudan.) 

 Specimens.— 'Nine, including 6 in alcohol, as follows : 

 Sudan: EJtiartoum (Heller, Loring). 



I Proc. Zool. Soc. London.vol. 2, p. i. 1902. 

 ' Bull. Mus. Comp. Zool., vol. 54, p. 325. December, 1911. 

 a Proc. Zool. Soc. London., 1914, p. 308. June, 1914. 

 * Bull. 57, U. S. Nat. Mus., p. 206. 1907. 



