PTEKOPUS CHUVSAUCHEN. 377 



Wirifjs. — Membranes about 25 mm. apart at origin from back. 



Interfemoral. — Short or undeveloped in centre. 



Far. — Very short and closely adpressed on back. Length of 

 ftir, back 7-9, mantle and belly 10-12 mm. Width of furred area 

 at middle of back 30-3S mm. Distribution of lur as in Pt. alecto ; 

 forearm and tibia naked above and beneath. 



Colour. — British Museum series (see list below): — ^Back and 

 rump glossy blackish, with or without a tinge of blackish seal- 

 brown, in most specimens thinly and rather inconspicuously 

 sprinkled with silvery-white hairs. — Chin, throat, foroneck along 

 middle line, breast, belly, and flanks blackish seal-brown, thinly or 

 rather thickly mixed with coarse, more or less crinkled, yellowish 

 or greyish hairs. — Mantle and occiput buff (jtalest extreme) or 

 ochraceous-buff or orange-buff or golden ochraceous ; the colour 

 of the mantle extending, in the same or a slightly darker tinge, to 

 sides of neck and sides of foreneck, being interrupted in the median 

 line of the foreneck by a broader or narrower longitudincl tract of 

 dark fur connecting durk throat and dark breast; huffy colour 

 of sides of neck more or less mixed with blackish hairs. Colour of 

 mantle sharply cut off from black of crown and back. — Forehead, 

 crown (as tar back as front of oars), and sides of head blackish 

 like back, in some specimens thinh', in others more or less thickly 

 mixed with buff}-^ hairs. Sides of rostrum generally similar to 

 crown, but in some specimens distinctly paler (compare Pt. con- 

 spiciUdtiis), owing to a slight predominance of the yellowish over 

 the blackish hairs. 



Individual variation in colour small, chiefly dependent on the 

 paler or deeper tinge of the mantle, and the thinner or thicker 

 sprinkling of the blackish fur with pale hairs. 



/Sexual differentiation. — Fur of mantle in males rigid and 

 unctuous, in females softer, more spreading. Hairs of mantle in 

 males yellowish from tij) to base, in females with rather long, 

 concealed, blackish or seal-brown bases. 



Measurements. On pp. 382, 383. 



Specinieiis examined. Nine, in the collections of the Berlin 

 and British Museums, including the type of the species and of 

 Pt. mysolensis. 



Range. Gilolo group (Morotai, Ternate, Batchian, Obi); islands 

 between Gilolo and New Guinea (Ghebi, Salawati, Mysol) ; N.W. 

 New Guinea (Dorei, Pinon I., Schouten Is.). 



Type in the Berlin Museum. 



Pttropus chnjsaucJien, Peters ; 1862. — Type locality, Batchian ; 

 type a mounted adult female, skull in situ, purchased of Frank, 

 Keg. no. 2270. The skull figured in ' Megachiroptera des Berliner 

 Museums' (pi. vi. tig. 1, Pt. alecto on plate) is that of a mounted 

 young female in the Berlin Museum, from Ternate, collected by 

 Bernstein, and acquired from the 1 eyden Museum, Reg. no. 4776. — 

 Only a few y eats later (1867), Pelers considered Pt. chrijsauchen 

 inseparable from Pt. alecto ; tlie same view was taken by Dobson 

 (1878). The species was restored by Matschie. It is, in fact, much 

 more closely related to Pt. conspi(iUatu< than to Pt. alecto. 



