26 



Christmas Island, 



a female carrying a well-grown young one, but was never able ta 

 obtain another specimen in this condition. Towards the end of 

 December several foetal specimens, some near the term, were 

 obtained. At this season most of the females seem to live in the 

 deeper parts of the forest, und nine out of ten of the specimens 

 killed near the settlement were males. Shortly afterwards these 

 also began to disappear, and it was not till March that they again 

 became numerous in the clearings. At this time a dead tree near 

 the east coast was seen covered with hundreds of these bats, but 

 a week or two afterwards they had complete^ forsaken it. 



Measurements of specimens in the present collection are given 

 below : — 





Head and Body. 



Hind -foot. 



Ear. 



$ 



190 



ram. 



37 



mm. 



28 mm 



cT 



198 





38 





. 22 „ 



$ 



180 





36 





27 „ 



6 



170 





40 





. 28 „ 



? 



187 





35 





. 26 „ 



? 



180 





32 





25 „ 



? 



1G7 





36 





25 ,, 



? 



193 





35 





25 ,, 



? 



180 





35 





. 26 „ 



2. Pipistrellus murrayi, sp.n. 



Muzzle obtuse, but less so than in P. alramus ; the glandular 

 prominences rather well marked. 



Ears triangular, with broadly rounded tips, relatively longer and 

 narrower than in P. ahramus ; outer border somewhat concave. 

 Tragus with parallel borders and rounded tip ; anterior border 

 straight, posterior convex. 



Feet small; wing membrane attached just below base of toes. 

 Distinct post-calcaral lobe. Last caudal vertebra (2 mm.) free. 

 Pur covers about the upper third of the humerus and half the 

 femur ; it extends very slightl}' on to the body membrane. On 

 the ventral surface the fur scarcely extends below anus, but sparse 

 hairs clothe the interfemoral membrane nearly to the tip of 

 the tail. 



Colour, a dark brown with yellowish tips to the hairs, but some 

 specimens are a distinctly reddish brown. Fur on dorsal surface 

 long and thick. In front of ear and round eye the skin is nearly 

 bare, and the same is the case with the tip of the muzzle. 



The outer incisor is rather longer than the outer cusp of the 

 inner, and on its postero - external surface the cingulum bears 

 a small but distinct cusp. 



The lower incisors slightly crowded. The point of the first 

 premolar is visible through space between the canine and p.m. 2. 



This species is considerabl}^ smaller than P. ahramus and the 

 common Pipistrelle. It is larger and much darker in colour than 



