41C 



EMBALLONTJEID^, 



Wings from the ankles or from the tibiae slightly higher up. Gular 

 sac distinct in males, rudimentary in females (Plate XXI. fig. 3). 



Fur short, and intensely black above and beneath. The muzzle 

 in front of the ears is nearly naked, also the inferior surface of the 

 lower jaw. The fur of the body extends upon the wing-membrane 

 above almost as far as a line drawn from the middle of the humerus 

 to the knee-joint ; beneath, as far as a line drawn from the middle 

 of the humerus to the middle of the femur ; a small patch of fur 

 appears on the upper surface of the antebrachial membrane near the 

 forearm, and the base of the interfemoral is covered, but the re- 

 mainder of the membranes are naked. 



Upper incisors close together, j)arallel ; lower incisors very small, 

 bifid, the outer incisor on each side concealed between the middle 

 incisor and the base of the canine ; inner basal cusps of the lower 

 canines almost touching behind the incisors, as in M. rufus. First 

 upper premolar very small, scarcely raised above the gum, and 

 scarcely visible without the aid of a lens, in the small space between 

 the canine and second premolar, but close to the outer margin of 

 that space ; in another specimen this small premolar is larger and 

 outside the tooth-row, though a narrow space still intervenes be- 

 tween the canine and the second premolar. 



Length (of an adult 5 ), head and body 3"-25, tail l"-8, tail free 

 from membrane 0"-9, head 1"-15, ear 0"-8, tragus 0"-12, forearm 

 2"-45, thumb 0"-45 ; third finger — metacarp. 2"-4, first ph. l"'l, 

 second ph. 1"'3 ; fourth finger — metacarp. 2"-3, first ph. 0"'9, 

 second ph. 0"'4; fifth finger — metacarp. 1" 2, first ph. 0''-8, second 

 ph. 0"-35; tibia 0"-7, foot 0"-4. 



ITab. Brazil (Mato Grosso ; Barrado B,io Negro) ; Surinam ; Peru. 



This species at first sight resembles M. rufus, with which it 

 nearly agrees in size and colour ; but the very different form of the 

 antitragus and muzzle at once distinguish it. 



a. 2 ad., al. Cohan. O. Salvin, Esq. [0.]. 



b. ad. sk. Central America. Purchased. 



c. ad. sk. Uemerara. SirR.Schomburgk[P.]. 



d. e. cJ & $ ad., al. Surinam. Purchased. 

 f. ad. sk. Cayenne. 



V/. 5 ad., al. M. Lidth de Jeude [C.]. 



h. 2 ^d., al. 



J. skeleton. Cohan, Guatemala. 0. Salvin, Esq. [C.]. 



7. Molossus perotis, 



Dysopes perotis, Wied, Beitr. Naturg. Brasil. ii. (1825) p. 227 ; 



Wagner, Suppl. Sclireb. Siiugeth. i. p. 473, v. p. 708 ; Burmeister, 



Thicre Brasiliens, p. 68 (1854). 

 Dysopes rufus, Temni. (non Geoffr.}, Monogr. Mammal, i. p. 230 



(1835-41). 

 Dysopes (Molossus) gigas, Peters, MB. Ahad. Berl. 1864, p. 381. 

 Molossus (Promops) perotis, Peters, I. c. 1865, p. 574. 

 Molossus perotis, Dobson, P. Z. S. 1876, p. 713. 



Ears very large, united in front ; laid forwards they extend 

 beyond the extremity of the nose ; the outer and inner margins of 



