664 GLYPHONYCTERIS. TRACHYOPS. 
625. sylvestris (Glyphonycteris), Thomas, Ann. Mag. Nat. Hist., 
6th Ser., Xv1I, 1896, p. 302. 
Forest Bat. 
Type locality. Imravalles, Costa Rica. 
Genl. Char. Similar to Hemiderma perspicillatum, but smaller; 
other characters those of the genus. 
Color. Above smoky gray; beneath whitish. 
Measurements. Head and body, 50; ear, 17; thumb, 9.2; middle 
finger, metacarpal, 36; tibia, 15; foot, 10.6; calcar, 7.2. Skull: 
greatest length, 19.7; greatest breadth, 9.6; basal length, 16; width of 
muzzle over antorbital foramina, 5.7; interorbital constriction, 4.6; 
from front of upper canines to back of upper third molar, 8. 
147. Trachyops. 
12; CE; PS; MBS= 34. 
Se se Sea 
Trachops (sic) Gray, Proc. Zodl. Soc., 1847, p. 14. Type Tra- 
chops! fuliginosts Gray = Vampyrus cirrhosus Spix. 
Trachyops Peters, Monatsb. K. Preuss. Akad. Wiss. Berl., 1865, 
Ds SES. 
Istiophorus (sic) Gray, Zodl. Journ., WU, 1825, p. 242. (nec 
Lacépéde, 1802, Ichthyology.) 
Nat. size. Enlarged 3 times. 
Fig. 139. TRACHYOPS CIRRHOSUS. 
ex Dobson, Cat. Chiroptera. 
Muzzle short, with numerous conical warts; nose-leaf narrow in 
front, erect leaf well developed; ears large; a groove margined with 
warts on lower lip and chin; interfemoral membrane extending 
beyond the tail, which penetrates the surface. Skull has a vaulted 
braincase, and is narrow between postorbital fosse; upper middle 
