572 Mr. G. S. Miller, Jr., on a 



narrow rounded ti|). Posterior margin convex from tip to 

 antitragus, though nearly straight through upper third. Anti- 

 tragus small but well developed, and siiarply defined from 

 rest of ear. It is roughly rounded-triangular in outline, the 

 anterior border faintly convex, the posterior slightly concave. 

 The anterior border is continued forward to terminate at a 

 distinct wart on lower lip at angle of mouth. Inner surface 

 of conch nearly smooth, though inconspicuously sprinkled 

 with very fine hairs. About halfway between meatus and 

 tip of ear two or three faint cross-ridges may be detected. 

 From anterior base of tragus there extends forward and 

 upward a distinct keel about 3*5 millim. in length and nearly 

 as well developed as in Nyctinomus minutus. Tragus scarcely 

 rising above level of eye. In form it is much like that of a 

 specimen of Nyctinomus Kaliaowskii, though in size it is 

 actually, as well as relatively, somewhat larger. Anterior 

 border faititly concave immediately above base, then strongly 

 convex, the convexity passing directly into that of tip, and 

 this again into that of posterior border. Posterior border 

 expanded near base into a narrow upright plate whose surface 

 is vertical to that of tragus. From tip of tragus spring a few 

 hairs, the length of which is about equal to height of tragus 

 from anterior base. 



Membranes. — The membranes are thin, delicate, and in no 

 way peculiar in structure. Wing from ankle, its attachment 

 on outer and lower side. Uropatagium ample, enclosing tail 

 to base or middle of penultimate vertebra. 



Feet. — The foot is small, about one third as long as tibia. 

 Its structure calls for no comment. Calcar about as long 

 as tibia, its tip forming a small but distinct lobe. Keel 

 narrow and inconspicuous. 



Fur. — The fur is soft and dense, its length over entire 

 dorsal surface about 8 tnilliin. Beneath it is shorter. It is 

 very closely confined to body, barely extending on extreme 

 base of membranes. The uropatagium both above and below 

 is sprinkled with fine hairs. Basal half of ear and entire face 

 densely furred. 



Colour. — Dorsal surface pale wood-brown, faintly washed 

 with ecru-drab across shoulders. Underparts dull buflf, 

 fading to whitish cream-buft" posteriorly. Face, ears, and 

 membranes blackish. Basal half of fur everywhere dull 

 slaty grey. 



ISkull. — The skull of Tomopeas ravus resembles in a general 

 way that of Rhogtessa tnmida^ but is less robustly formed, 

 and the brain-case is less elevated. Zygomata very slightly 

 flaring, much less prominent than in Rhogeessa tumida. 



