24. TAMPYKOPS. 625 



tlia anterior extremity of its outer margin from the end of the 

 muzzle ; the tragus is similar to that of V. lineatus. 



Wing- and interfemoral membranes as in V. lineatus. 



Fur dark brown above and beneath, the upper facial streaks pale 

 but distinct, the lower represented by a short naked white patch of 

 integument on either side ; a very distinct but narrow white line 

 commences on the crown of the head and extends along the spine, 

 contrasting strongly with the surrounding dark-coloured fur. On 

 the wing-membrane above the fur extends outwards scarcely as far 

 as a line drawn from the elbow to the middle of the femur ; the ante- 

 brachial membrane is nearly naked, but the humerus and the mus- 

 cular part of the forearm are covered ; the interfemoral membrane 

 is almost naked on its upper surface, but fringed along its poste- 

 rior margin; the legs and back of the feet are clothed with short 

 hairs. 



Incisors as in V. lineatus, the upper middle pair with very 

 oblique cusps widely separated at their bases, but meeting by the 

 inner sides of their extremities (Plate XXIX. fig. 1 a) ; the first 

 upper premolar has a broader and more projecting base posteriorly 

 than in that species, and its cusp is comparatively shorter (Plate 

 XXIX. fig. 1); last upper molar directly behind the second molar, 

 not pressed inwards, as large as one of the upper middle in- 

 cisors ; the first lower molar is triangular in horizontal section, and 

 equal in anteroposterior diameter to the rectangular second molar ; 

 the last molar is nearly square, rather more than one quarter the 

 superficial extent of the antepenultimate molar in horizontal sec- 

 tion (Plate XXIX. fig. 1). 



Length, head and body 3"'4, interfemoral membrane in the middle 

 0"'35, head 1"'35, eye from anterior margin of the nose-leaf 0"'45, 

 nose-leaf 0"-5 X 0"*35, head l"-35, ear 0"*9, tragus 0"*35, forearm 

 2"-35, thumb 0"-5 ; third finger— metacarp. 2"-15, 1st ph. 0"-9, 2nd 

 ph. 1"'2, 3rd ph. 0"-85 ; fourth finger — metacarp. 2"-15, 1st ph. 

 0"-75, 2nd ph. 0"-85 ; fifth finger— metacarp. 2"-2, 1st ph. 0"-6, 

 2nd ph. 0"-7 ; tibia 0"-85, calcaneum 0"-28, foot 0"-6. 



Hab. Costa Rica ; Venezuela (Puerto Caballo). 



This is the largest known species of the genus, and in size is to 

 V. lineatus as small individuals of A. perspicillatus to A. cinereus. 

 In Dr. Peters's very short original description the nose-leaf is de- 

 scribed as being soldered down to the muzzle in front, which is not 

 the case in the well-preserved specimen from which I have taken 

 the above description, although the part of the nose-leaf in front of 

 the nasal apertures is very short. It appears evident, however, that 

 the original description was taken from a dried specimen in which 

 the free front edge of the nose-leaf had so shrunk up in the drying 

 process as to quite escape notice. 



a. (S ad., al. Costa Rica. Purchased. 



