rTEROrUS HYI'OJIELANUS EXGAXTS. 107 



ciniiamon-rufous, base generally blackish. — Crown aii'l sides of 

 head similar to back, occasionall}- slighth* suffused with a tinge 

 similar to or darker than that of mantle. Throat blackish or 

 blackish seal-brown like rest of underparts. 



(b) Hairbrown-bellied phase (5 vg. ad. skin; no. 104466).— 

 The peculiar colour of this phase is due to an increase in the 

 amount of silvery white hairs on back, breast, and belly. Back 

 and rump greyish hair-brown. Breast, belly, and flanks mixed 

 greyish white and blackish, the former colour predominating. 

 Mantle seal-brown inconspicuously sprinkled with silvery white 

 hairs ; sides of neck and foreneck nearly blackish. Head grizzled 

 greyish white and blackish as rump. 



Measurements. On pp. Ill, 112. 



Specimens examined. Six skins and skulls, paratypes, from the 

 collection of the U.S. National Museum *. 



liamje. Mergui Archipelago (S. Twin Island). 



Type in the U.S. National Museum (no. 104464). 



Pteropus geminorum. Miller; 1903. — Miller separated P/. ^e»n'- 

 nor^iin from lepidus on account of its darker colour and smaller 

 teeth. But lepidus is an unusually pale-backed and large-toothed 

 form. The skull and teeth of r/emino)-inn are in every respect 

 indistinguishable from those of most other forms of Ft. h>/po- 

 vtehmus, and even from those of lejndus they differ only in average 

 characters. The grizzled greyish and blackish colour of the head 

 and back, the dull chestnut or chestnut and seal-brown mantle, 

 and generally blackish underside give a series of e/eminornm, if 

 taken as a whole, a somewhat peculiar aspect, but individuals 

 which to the smallest details of colour are similar to an average 

 specimen of gcminorum are found in lepidus and caeiayamis. 

 Pt. h. c/eminorum is a well-marked geographical race of hyjjo- 

 nielanus, but I am unable to draw a "hard-and-fast" line between 

 this and allied forms of the species. 



1 b. Pteropus hypomelanus enganus. Miller. 



Pteropus hypomelanus (7iec 7'emm. subsp.), Thomas, Ami. Mus. Civ. 



Genova (2) xiv. p. 106 (April, 1894: Eiigano); ? id., torn, cit, 



p. 6G4 (June, 1895: Si Oban, Mentawei) ; Trouessart, Cat. 



Mavim. i. p. 82 (pt.) (1897: Engano); Willink, Nat. Tijd. 



Kedirl. Ind. Ixv. p. liH (pt.) (1905 : Engano ; ? Mentaweij. 

 Pteropus (Spectrum) hypomelanus (pt.), Matschie, Megachir. p, 24 



(1899: Engano; ? Mentawei). 

 Pteropus enganus. Miller, Proc. U. S. Nat. Mus. xxx. pp. 822, 824 



(1906: Engano, l*ulo Dua, Pulo Mirbau). 



Diagnosis. — Averaging smaller than any other race of the species. 

 Back and head darker or lighter hair-brown with or without russet 

 or huffy suffusion ; underside approximately seal-brown, more or 

 less sprinkled with grey, and more or less suffused with huffy 



' >-os. 101461-63, 10446.5-07. 



