2. PTKROPTIS. 37 



humerus to the knee, upon the femur, knee, and adjoining wing- 

 membrane along the proximal third of the tibise, about two thirds of 

 which are thickly covered with straight hairs directed backwards, 

 their distal thirds being nearly naked as well as the feet ; and, al- 

 though the fur of the back extends upon the interfemoral mem- 

 brane, it does not conceal its posterior margin, and its lower third, 

 supported by the calcanea, is naked. Beneath, the antebrachial 

 membrane is covered with long thinly-spread hairs, and similar 

 hairs clothe the wing-membrane between the humerus and femur, 

 and extend outwards in a broad band behind the forearm. Face 

 reddish brown, with a few greyish or shining hairs ; chin and throat 

 darker brown ; top of the head and nape reddish or yellowish brown, 

 passing into a band of bright yellow, which extends across the back 

 of the neck from shoulder to shoulder, and downwards on the sides 

 of the neck and thorax, limited by a longitudinal band of dark fur 

 passing backwards from the chin along the thorax to the abdomen, 

 which is clothed with dark brown fur, of which some hairs have 

 greyish or shining extremities ; fur of the back behind the shoulders 

 dark brown, the extremities of the hairs more or less yellowish. In 

 the male the extremities of the hairs on the head and back are much 

 brighter-coloured than in the female. 



Pirst upper premolar deciduous ; the second upper premolar and 

 the second and third lower, also the first and second upper molars 

 and the first lower, have each a small but distinct posterior basal 

 cusp ; even the small first lower premolar has an indication of a 

 posterior basal cusp ; last upper molar very small and circidar, not 

 as large as the first lower premolar ; last lower molar slightly larger 

 than the first lower premolar. 



Length (of an adult cJ preserved in alcohol), head and body 7", 

 head 2"-2, ear 0"-9, ear from tip of nostril 2", eye from tip of nostril 

 0""8, forearm 4"-9 ; thumb — metacarp. 0"-35, ph. and claw 1"'6 ; 

 third finger— metacarp. 3"-3, 1st ph. 2"-4, 2nd ph. 3"-55 ; fourth 

 finger— metacarp. 3"-25, 1st ph. 2", 2nd ph. l"-85 ; fifth finger— 

 metacarp. 3"-35, 1st ph. l'-5, 2nd ph. l"-45 ; tibia 2"-25, calcaneum 

 0"-6, foot 1"-15. 



Hah. Island of Eodriguez. 



a-rf. d & ? juv. et ad., al. Rodriguez. Royal Society. 



e. 2 ad. Rodriguez. Royal Society. 



/. ad. sk. Rodriguez. Royal Society. 



g. skeleton. Rodriguez. Royal Society. 



15. Pteropns hnumeus. 



Ears as in Pt. keraudrenii, but naked, scarcely as long as the muzzle, 

 triangular above, obtusely pointed (Plate III. fig. 6). 



Interfemoral membrane very narrow behind, concealed by the fur 

 in the centre. 



Fur rather short throughout, longer on the neck than on the back, 

 where it is directed backwards and slightly appressed, occupying a 



