20 PTEBOPODID^. 



scarcely appressed, on tlie interfemoral and 

 legs similar. 

 c*. Wings from tlie sides of the back; general 

 colour of the fur and membranes brown. 



13. Ears shorter than the muzzle; the con- 

 cave surface of the conch thinly clothed 

 with short hairs ; tibia covered almost to 



the ankles; premolars and molars with [p. 35. 



posterior basal projections; forearm 5". Pt. samoensis, 



14. Ears slightly longer than the muzzle, the 

 concave surface of the conch nearly 

 covered with soft fur, tibiae half-clothed ; 



premolars and molars with posterior basal [p. 36. 



projections; forearm 4"'9 Ft. rodricensis, 



15. Ears scarcely as long as the muzzle, 

 naked ; tibiae clothed almost to the 

 ankles ; premolars and molars without 



basal projections ; forearm 4"'5 Pt.brunne«s,'<p.37. 



d^. Wings from the back near the spine ; fur 

 pale-coloured, silky, generally with more 

 or less distinct facial streaks; legs clothed 

 to the ankles. 

 d^. With distinct facial streaks. 



a. Facial streaks black or dark brown. 



16. Muzzle half sun-ounded by a black 



streak behind the eyes ; forearm [p. 38. 



3"'6 Pt. personatus, 



17. Muzzle completely suiTounded by a 



black streak behind the eyes ; fore- [p. 39. 



arm 4"-4 Pt. capistratus, 



^. Facial streaks white. 



18 Pt. waUacei, p. 40. 



y. No distinct facial streaks. 



19. Ears as long as the muzzle; fore- rp-40. 



arm 4" Pt. temminckii, 



d'". Fur of the back short, closely appressed (in 



adults) ; tibiae naked or very thinly clothed 



with a few scattered hau-s. 



«*. Molars very narrow, but slightly raised above 



the gum ; first upper premolar minute, 



persistent. 



20. Ears slightly longer than the muzzle; [p. 41. 



molars exceedingly narrow; forearm 5"-4 Pt. scaptdatus, 



21. Ears much longer than the muzzle; 



molars larger ; forearm 5"-4 Pt. macrotis, p.42. 



/*. Molars well developed ; first upper premolar 

 minute, generally deciduous, 

 y. Wings from the back close to the spine ; 

 back generally clothed by a narrow longi- 

 tudinal line of short fur, or quite naked. 

 /'. Interfemoral membrane very narrow in 

 the centre, concealed by the fur. 

 a. Ears not longer than the muzzle, obtuse. 



22. Smaller : forearm 4" -5 ; membranes 



pale brovra pt, griseus, p. 44. 



23. Larger: forearm 7"; membranes [p- 44- 

 .black Pt. melanojjogon, 



