456 



I'ilYLLOSTOMirJE. 



second and rather deeper expansion (described above in connexion 

 with the ear), which extends from the wart terminating the outer 

 margin of the ear- conch at the angle of the mouth to the posterior 

 surface of the anterior chin-lappet (Plate XXIII. fig. 5). 



"Wings from the inferior and inner surface of the distal third of 

 the tibia, from the adjoining interfemoral membrane, and from the 

 calcaneum ; interfemoral membrane very large, extending much be- 

 yond the tail, whereof the fourth vertebra perforates the membrane, 

 and three and a half vertebrae project upon its upper surface. Tibiae 

 very long ; feet slender, toes nearly equal in length. Volar mem- 

 braues very thin and translucent ; aU the bones of the extremities 

 very slender and fragile. 



Fur very fine and dense, extending thinly upon the crown of the 

 head, but forming a long and dense fringe along the sides of the 

 upper lip, and covering the anterior surface of the erect cutaneous 

 processes which are continuous posteriorly with the ear-conch. 

 Above, the fur scarcely extends upon the wing- or interfemoral 

 membranes ; beneath, the wing-membrane is thinly covered as far 

 as a line drawn from the distal third of the humerus to the distal 

 third of the femur. 



Above and beneath dark reddish brown. 



Upper middle incisors much larger than the outer ones, with wide, 

 straight, notched cutting-edges ; outer incisors acutely pointed, the 

 cusp of each directed inwards towards the middle incisor ; lower 

 incisors equal, trifid, in a semicircular row between and in front of 

 the canines. Upper canines very long and slender, their outer mar- 

 gins slightly concave, as in the Molossi ; first upper premolars short, 

 but with a broad base, which occupies the wide space between the 

 canine and second premolar ; second upper premolar nearly equalling 

 the lower canine in vertical extent ; second lower premolar smaller 

 than the first and third, but well developed and nearly equalling the 

 first upper premolar in vertical extent ; aU the molars with very 

 acute W-shaped cusps, 



(For measurements see p. 458,) 



Hah. Mexican and Brazilian Subregions (Mexico ; Central 

 America; Columbia), 



a. (S ad., al. Duefias, Guatemala. 0. Salvin, Esq. [C], 



h. 5 ad., al. Coliunbia. Purchased. 



c. ad. sk. South America. 



2. Mormops blainvillii, 



Aello cuvieri, Leach, Trmisact, Linn. Soc. xiii. p. 71 (1820-22) (see 



note on genus Aello above). 

 Mormoops blainviUii, Leach, I. c. p. 77, pi. vii. figs, 1-4. 



In general appearance like M. megalophylla, but smaller, and 

 .easily distinguished by the form of the ears, by the chin processes, 

 and by the colour of the fur. 



The summit of the inner margin of the ear-conch is distinctly 

 notched near the cutaneous process connecting it with the muzzle ; 



