374 EUBALLONUSID^. 



as in S. leptura, except that there is no triangular lobe above the 

 base of the outer margin, and the extremity is narrower above. 



Antebrachial pouch in the centre of the anterior half of the upper 

 surface of the membrane ; aperture directed outwards, commencing 

 at the anterior free margin and extending backwards towards the 

 elbow-joint as far as the centre of the membrane ; the sac much 

 smaller than in S. leptura, scarcely projecting on the inferior surface 

 of the membrane, and its cavity is not marked with such deep pli- 

 cations of the lining membrane ; in the female the position of the 

 mouth is alone marked by a slight reduplication of the membrane. 



Wings from the ankles ; calcaneum and interfemoral membrane 

 as in 8. leptura ; the last caudal vertebra projecting on the upper 

 surface of the membrane. 



Pur dark brown above, paler beneath, not extending upon the 

 membranes so far or so densely as in S. leptura. 



Length, head and body 2", tail 0"*6, head 0"-7, ear 0"-7, tragus 

 0"'2, forearm l"-8, thiunb 0"-3 ; third finger — metacarp. l"-55, 1st 

 ph. 0"-55, 2nd ph. 0"-95 ; fourth finger — metacarp. l"-3, 1st ph. 

 0"-35, 2nd ph. 0"-35 ; fifth finger— metacarp. l"-2, 1st ph. 0"-45, 

 2nd ph. 0"-25 ; tibia 0"-75, foot 0"-35. 



Hah. Central America (Guatemala, Coban) ; Venezuela ; British 

 Guiana; Brazil (Atacamis). 



a, h. 2 ad., al. Coban, Central America. 0. Salvin, Esq. [C.]. 



c. 5 ad. sk. Atacamis, Capt. Kellett and Comm. 



Wood [P.]. 

 d-e. 5 ad., al. Haslar Hospital Coll. 



/. skeleton. Haslar Hospital Coll. 



Var. a. {Saccopteryx kappleri.) 

 Peropteryx kappleri, Peters, MB. Akad. Berl. 1867, p. 473. 



I have examined the type of Peropteryx Tcappleri, Ptrs., which is 

 preserved in the Berlin Museum, and can find no difference, except 

 in size, between it and 8. canina. 



As the differences in size consist in the greater length of the ex- 

 tremities (see below) , it appears to me to be either an old individual 

 (as Dr. Peters suspects) or a local variety. 



Length, head and body 2"-l, tail 0"-6, ear 0"-7, tragus 0"-2, 

 forearm 2", thumb 0"-3 ; third finger — metacarp. 1"'75, Ist ph. 

 0"-55, 2nd ph. 1" ; fifth finger 2"-l, tibia 0"'8, foot 0"-4. 



Hab. Surinam, 



4. Saccopteryx leucoptera. 



Peropteryx leucoptera, Peters, MB. Akad. Berl. 1867, p. 474. 

 Peropteryx (Peronymus) leucoptera*, Peters, I. c. 1868, p. 145. 



Ears united across the face by a low band about one tenth of an 

 inch high in the centre ; inner margin of the ear-conch straight, 



* Made the type of a new subgenus, Peronymu?, by Peters, on account of the 

 united condition of the ears, and the position of attachment of the wings to 

 the feet. 



