NO. 12 NEW INSECTIVORES FROM AFRICA HELLER 3 



Skull: Greatest length, 14.8; condylo-incisive length, 14.3; basilar 

 length, 11; zygomatic length, 5.6; upper cheek teeth, 4.8; condylo- 

 incisive length of mandible, 10.9; coronoid-angular depth of man- 

 dible, 3.5. 



The type was secured in a large crevice among granite boulders 

 on the summit of a small kopje. One other specimen was shot at 

 dusk among some acacia trees in the same vicinity. 



PIPISTRELLUS AERO, new species 

 Uaragess Pipistrelle 



Type from summit of Mount Garguez, Mathews Range, altitude 

 7,000 ft, British East Africa, adult male; No. 181812, U. S. Nat. 

 Mus. ; collected by Edmund Heller, August 26, 191 1 ; original num- 

 ber, 41 10. 



Characters. — Similar to fuscatus in color and in the position of 

 the first upper premolar which is placed well inside of the tooth-row, 

 but size of body much less, equal to that of nanus, which differs 

 from it in the position of the minute first upper premolar which is 

 in the tooth-row and can be seen from the outside. Skull larger 

 than in nanus. 



Coloration. — Dorsal coloration uniform vandyke-brown ; under- 

 pays lighter wood-brown, the hair everywhere slate-black at base; 

 membranes, feet, ears, and tail black. 



Measurements. — Head and body, 42 mm.; tail, 32; foot, 6; ear, 

 10.5; forearm, 31.5. 



Skull: Condylo-incisive length, 12; zygomatic breadth, 8.5; 

 mastoid breadth, 7 ; length upper tooth series to outer edge of canine, 

 4.8; condylo-incisive length of mandible, 9. 



Two additional specimens from the summit of Mt. Garguez are 

 in the collection. They agree with the type in color, size, and dental 

 characters. This species was seen only in the heavy forest on the 

 summit of the mountain. Numbers of them were seen at dusk every 

 evening but no other species was noted at so high an altitude. 



PIPISTRELLUS HELIOS, new species 



Samburr Pipistrelle 



Type from Merelle Water, 30 miles south of Mt. Marsabit, British 

 East Arica; adult male; No. 181813, U. S. Nat. Mus.; collected 

 by Edmund Heller, July 22, 191 1 ; original number, 3065. 



Characters. — Related most closely to nanus but size much less and 

 coloration much paler; size of culex, but inner upper incisors broad 



