1906.] MAMMALS PROM SOUTH-WEST AUSTRALIA. 471 



brown, the terminal third of the hairs lighter and more ap- 

 proaching russet, especially posteriorly, the basal two-thirds 

 blackish. Below, the ends of the hairs are nearer wood-brown, 

 except on the interfemoral band, where they become whitish. 

 Ears small, too much shrunk and distorted for exact description, 

 but their inner margin appears to be unusually convex ; tragus 

 not broadened. Wings to the base of the toes. A narrow post- 

 calcareal lobule present. 



Skull long and narrow, with an unusually low flattened brain- 

 case ; no occipital helmet, the lambdoidal crests commencing 

 rather low down on each side. 



Inner upper incisor bifid, with a well-marked external secondary 

 cusp near its tip, wearing off in older specimens. Outer incisors 

 small, not i-eaching halfway from the cingulum to the outer cusp 

 of the inner incisors ; hollowed out behind to receive the tip of 

 the lower canine ; a small secondary cusp on its internal edge. 

 Small premolar quite minute, crushed in the angle between the 

 canine and second premolar, which press against each other out- 

 side it ; it is evidently in an extreme state of reduction, and has 

 become altogether lost on one side in the type. Lower incisors 

 tricvispid, transverse, overlapping. 



Dimensions of the type, measured in skin : — 



Forearm 38 mm. 



Head and body (c.) 47 mm. ; tail 44 ; third finger 65 ; lower 

 leg and foot (c.u.) 26. 



Skull — greatest length to base of incisors 12"7 ; basal length in 

 middle line 9*5 ; mastoid breadth 7*2 ; intertemporal breadth 3 ; 

 palate length 4*6 ; front of canine to back of m^ 4"7 ; front of 

 lower canine to back of mg 5. 



Type. No. 4, sex not ascertainable. B.M. No. 6.8.1.18. 



Althovigh without any very strongly marked characteristics, this 

 dull-looking little bat does not agree with any species hitherto 

 described. Altogether Australia is poor in members of this widely 

 distributed genus, the only other Pipistrelles being one fi'om 

 N. Australia, referred to P. ahramus, and the large and aberrant 

 P. tasmaniensis. 



The two specimens of P. regulus sent home by Mr. Shortridge 

 were not captured by him, but were made into skins from old 

 mounted specimens. 



6. Chalinolobus gouldi Gray. 



c?. 144, 145, 146, 147. Parker's Range, Southei-n Cross. 

 1163'. 9-17 August. 



6 . 150, 151, 152, 153, 154, 155, 156, 157, 159. $ . 149, 158, 

 160. Jaurdi Hills, near Kalgurli. 1250'. 21-24 September. 



c?.169. $.168. North Pool, Laverton. 1650'. 28 October. 



Not previously recorded from Western Australia. 



7. Chalinolobus morio Gray. 



S . 50 (in spirit). King River, King George's Sound. 



