112 Proceedings of the Biological Society of Washington. 



Remarks. — This small Pteropus appears to be nearest related to 

 Pt. speciosus from Malanipa Island, but is readily separated from that 

 form by its much lighter color, above and below, and by the distinctly 

 smaller pollex. From Pt. pumilus, of Pahnas Island, which it greatly 

 resembles in the color of the upperparts, it differs in its decidedly greater 

 size. The single specimen was "found in the forest clinging to branch 

 of deciduous tree." 



Pteropus mearnsi sp. nov. 



Type from Isabella, Basilan Island. U. S. National Museum No. 

 14-1739, skin and skull of c? adult. Collected January 26, 1906, by 

 Dr. Edgar A. Mearns. Orig. No. 6024. 



Diagnosis. — A member of the hypomelanus group. Coloration almost 

 exactly like the darker specimens of Pteropus hypomelanus cagayanus ; 

 size considerably less, with much smaller skull. 



Color. — Muzzle and head mummy-brown, lighter on crown; mantle 

 chestnut; back and rump brownish black with wash of rusty. Breast 

 Hessian brown, mixed with blackish; flanks and lower belly dark chest- 

 nut brown, with much blackish ; center of belly lighter, golden ochraceous. 

 Five adults are very uniform in color; a single young example has a much 

 lighter mantle. 



Skull and teeth. — Skull about intermediate in size between skulls of 

 Pteropus speciosus and Pt. h. cagayanus. In general like skull of caga- 

 yanus, but considerably smaller, with relatively much larger braincase. 

 Teeth essentially as in cagayanus. 



Measurements of type . — Forearm, 123; pollex, total length, c. u., 55; 

 second digit, total length, c. u., 89.5; third digit, metacarpal, 82.5; third 

 digit, first phalanx, 61; foot, c. u., 41. Skull: Condylobasal length, 

 53.4; zygomatic breadth, 34; breadth braincase at zygomata, 22.4; front 

 of orbit to end of nasal, 19.5; orbital diameter, 12; least breadth 

 rostrum, 10.2; interorbital breadth, 8.5; upper toothrow, entire, 28; 

 upper molar-premolar row, alveoli, 15.4; mandible, 46.5; lower tooth 

 row, entire, 27.8; lower molar-premolar row, alveoli, 21.5. 



Remarks. — Except for its smaller size, Pteropus mearnsi greatly resem- 

 bles Pt. h. cagayanus ; and it is conspicuously different from all other 

 Philippine species. In size it approximates Pt. mimus, but it differs 

 greatly in color from that species. Six specimens have been examined, 

 all collected by Doctor Mearns; four from Isabella, Basilan, and two 

 from Zamboanga, Mindanao. The species apparently replaces the widely 

 ranging Pt. h. cagayanus in these localities. 



