638 



THYROPTERA. 



FIG. 129. THYROPTERA DISCIFERA. 



No. 105419 U. S. Nat. Mus. Coll. 

 2% times nat. size. Face enlarged 7 times. 



den in fur; tips pointed, lower two-thirds of outer margin convex, 

 terminating midway between tragus and angle of mouth; upper por- 

 tion of outer margin concave; "tragus short, with a prominent 

 lobule opposite the base of its inner margin directed forward, ab- 

 ruptly narrowed in upper third, very acutely pointed and curved 

 inward ' ' ; deep pit between nostrils ; lower lip with groove on each 

 side inclosing an angular cushion; wing membrane to ankles; a cir- 

 cular hollow disk on ball of thumb and another smaller one on sole 

 of the foot; upper incisors directed forward and inward, bifid; 

 lower incisors trifid; canines small; the first upper premolar smaller 

 than second, and first lower premolar also smaller than second but 

 larger than canine; middle lower molar largest. 



FIG. CIV. THYROPTERA DISCIFERA. 

 No. 102923 U. S. Nat. Mus. Coll. 



