90 
BULLETIN 57, UNITED STATES NATIONAL MUSEUM. 
Genus CORMURA Peters. 
1867. Cormura Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, 
p. 475, plate opposite p. 480. 
Type-species. — Saccopteryx brevirostris Wagner. 
Geographic distribution . — Brazil. 
Number of forms. — The type is the only known species. 
Characters. — Skull as in Saccopteryx y but rostrum shorter; depth 
through lachrymal region greater; rims of orbits more widely ex- 
panded, palatal emargination extending back to level of small pre- 
molar; and interpterygoid fossa nearly parallel-sided, slightly con- 
stricted near middle, its anterior termination broad and encroached 
on by evident median palatal projection. Teeth not essentially dif- 
ferent from those of Saccopteryx . Position of wing sac not known. 
Species examined. — The characters of Cormura are known from 
Peter’s description and plate only. 
Remarks. — Though apparently a near ally to Saccopteryx , this 
genus is readily distinguishable by the structure of the interpterygoid 
Genus PEROPTERYX Peters. 
1867. Peropteryx Peters, Monatsber. k. preuss. 
Akad. Wissensch., Berlin, p. 472 (genus). 
1878. Peropteryx Dobson, Catal. Ckiropt. Brit. 
Mus., p. 370 (subgenus of Saccopteryx) . 
1899. Peropteryx Miller, Bull. Amer. Mus. 
Nat. Hist., XII, p. 178, October 20, 1899 
(genus). 
Type-species. — V espertilio caninus Wied. 
Geographic distribution. — Tropical main- 
land of America, north to southern Mexico ; 
southernmost Lesser Antilles. 
Number of forms . — Three species of Pe- 
ropteryx are now known. 
Pig. 15.-t-Peropteryx trinitatis 1 u 
type, adult female. Port of Characters . — Like Saccopteryx but with 
spii^iEiNiBAD. No; 7496, amer. rostrum (fig. 15) so inflated that it is uni- 
formly convex both antero-posteriorly and 
laterally ; depth of rostrum anteriorly great enough to make the dor- 
sal profile nearly parallel with tooth row. Wing sac opening outward 
near the anterior border of antebrachial membrane. Ears separate. 
Species examined. — Peropteryx canina (Wied), P. kappleri 
Peters, and P. trinitatis Miller. 
Genus PERONYMUS Peters. 
1868. Peronymus Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, 
p. 145 (subgenus of Peropteryx) . 
Type-species. — Peropteryx leucoptera Peters. 
Geographic distribution . — Northern South America. 
