24 Mr. K. Andersen 07i 



species is much nearer to that of an ordinary Pleropus : head, 

 back, and underparts dark, mantle paler. The single species 

 of this group inhabiting the Talaut Islands {A. humilis) is 

 easily recognizable by its small size; externally it is much 

 like certain dark-coloured forms of Pteropus hypomelanus ; 

 the two Philippine species {A.juhatustiixdL lucifer) are chiefly 

 characterized by their larger size and strikingly pale-coloured 

 nuchal patch ; inter se, they differ only in size. 



Synopsis of Species and Subspecies. 



I. No antero-internal basal cusp in p^ ; ears longer 



than muzzle (front of eye to tip of nose) ; 



pale-coloured forms: back and underparts 



approximately mars-brown or vandyck- 



bro-nn, lightened with golden bufly, head 



and mantle essentially buffy. (Timor and 



Celebes groups.) 



a. Dentition heavy : m\ length (antero-poste- 



rior diameter of crownj 5 6-6 mm. ; skull, 



total length 66-72 mm. (Timor group.) 



o\ Larger: skull, total length 69-72 mm. ; 



forearm 139-156 mm. (Timor ; Flores j 



Alor.) \. A mackhiti. 



or. Forearm about 139-146 mm. 



a^. Underside of body rather thinly 



sprinkledwithbuffv hairs. (Timor.) \ a. A. m. mackluti. 

 b'. Underside of body thickly sprinkled 



with buffy hairs. (Flores.) lb. A. m.Jloresii. 



P. Forearm about 156 mm. (Alor.). ... \c. A. m. aloiensU. 

 ft*. Smaller : skull, total length 66 mm. ; 



forearm 135 mm. (Sumba.) 2.-4. gilvus. 



ft. Dentition much weaker : m^, length 47-5 

 mm. ; skull, total length 62'5-63 mm. 

 (Celebes group.) Z. A. celebensia. 



II. A distinct antero-internal basal cusp in />3 ; 



ears shorter than muzzle ; dark-coloured 

 forms : back and underparts seal-brown or 

 burnt umber, more or less sprinkled with 

 pale hairs ; mantle chestnut or dark cinna- 

 mon-rufous. (Talaut Is. ; Philippines.) 



c. Small : forearm about 140 mm. ; no buffy 



nuchal patch. (Talaut Is.) 4.-4. hmnilis, 



d. Large : forearm 165-205 mm. : a buffy 



nuchal patch strongly contrasting with 

 dark mantle and sides of neck. (Philip- 

 pines.) 

 c^ Forearm about 165 mm. (Panay.) .... 5. A. lucife)'. 

 (P. Forearm 182-205 mm. (Philippines 



generally.) 0. A.jubcitus. 



c\ Averaging smaller: forearm 182-198 

 mm. (Philippines north of Min- 

 danao.) 6 «. A.j. jubatus. 



cf^. Averaging larger : foreanu about 



205 mm. (Mindanao.) Hb. A.J. mindcmeHgi?. 



