244 



PTEROmS AEUENSIS. 



JZemarlcs. — The collar (mantle, sides of neck, and foreneck) is in 

 this species rather similar in colour to that of Pt. melanofogon, 

 though on the whole slightly darker. But the chestnut of the collar 

 is made still more conspicuous by the contrast of the beautiful silky 

 whitish tinge of the back, a colour rather rare in the genus (cf. Pt. 

 temmincki, capisiraUis, personafus, hypomelanus canus, h. lejndus). 

 There can be no doubt that Pi. aruensis is the Aru representative 

 of Pt. melaiiopor/071, with which species it completely agrees in the 

 characters of the skull and teeth and the shape and size of the ears. 

 Pt. aruensis is similar to many other species of the genus in the 

 distribution of the fur of the back, but peculiar in colour, while 

 Pt. melanojjor/on is rather ordinary in colour, but peculiar in the 

 extreme reduction of the furred area of the back. 



a. Ad. St. 



Aru Is. 



Dr. A. R. Wallace [0.]. 58.2.20.2. 



{Tj/pe oi' Pf. argentatus, Gray, 1858 nee 1844.) 



External measurements of Pteropus melanopogon and aruensis. 



Pt. melanopogon. 

 3 ad.* 



Pt. aruensis. 

 2ad.t 



MiN. 



Max. 



inni. mm. 



Forearm ' 196 204 



PoUex, total length, c. u 1 74-5 81 



metacarpal [ 17-5 20 



„ 1st phalanx • 405 41-5 



2nd digit, metacarpal | 103 108 



iBt phalanx i 21'5 24 



2nd-3rd phalanx, c.u...! 19 20 



3rd digit, metacarpal 134 144-5 



l8t phalanx : 97-5 104-5 



2nd plialanx j 144-5 147 



4th digit, rn etaca rpal i 1 28-5 136 



Ist phalanx \ 80-5 86-5 



,, 2nd phalanx I 81-5 85 



5th digit, metacarpal i 137 147 



,, Istphalau.x ! Gl (13-5 



2nd phalanx I CO 63-5 



Ears, length from orifice I 30 1 



,, greatest width, flattened ... 19-6 1 



Lower leg 835 85 



Foot, c.u ... 68 



Calcar ... 24 



MiN. 



Max. 



?87 



* B.M. 62.5.24.1 (Burn) and 62.5.1.5 (Cerara); Leyden Museum / (Amboina). 

 t Type of species, and B.M. 68.2.20.2. 

 J Estimate (skins). 



