2l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 



A few of these bats Avcre found clinging from the rafters in the 

 half dark attic of an old house at San Pablo, April 21, 1911. A 

 corner of the same attic was inhabited by Eptcsicus propinquus. 

 Henry Pittier took a specimen of Rhogccssa tumida at La Palma de 

 Darien in January, 1912. Bangs (1902, p. 50) records a specimen 



Fig. 22. — Rhogeessa tumida. 

 No. 52065, U. S. Nat. Mus. About nat. size. 



collected by W. W. Brown, Jr., at Bugaba, which was rather doubt- 

 fully referred to this species by G. S. Miller, Jr. 



Specimens examined : Bugaba, 1 1 ; La Palma de Darien, 1 ; San 

 Pablo, 3. 



Family MOLOSSIDAE 



The family Mo'lossidre includes large, medium and small bats with 

 short, thick, leathery ears, broader than high, and projecting far 

 forward over the eyes. The short thick muzzle is not provided with 

 a nose leaf, the legs are short and the long tail projects prominently 

 beyond the posterior border of the short interfemoral membrane. 

 The general pelage is short and velvety ; very short hairs with 

 thickened and more or less distinctly spoon-shaped tips are present 

 on the upper lip, and similarly modified hairs form a fringe along the 

 under and outer sides of the lateral digits of the foot; more con- 

 spicuous but slender hairs with recurved tips project beyond the 

 claws. The wings are very narrow, and together with the peculiar 

 shape of the ears give bats of this group an angular appearance in 

 flight. 



Genus MOLOSSOPS Peters 



The genus Molossops closely resembles Molossus in external 

 appearance, but more conspicuous lines of fur diverging from the 

 angle in the bend of the wing along the forearms and fourth finger 

 are usually distinctive. The skull is distinguishable from those of 

 Molossus and Eumops by the high, but broad, flattened rostrum with 

 conspicuous, laterally projecting lachrymal ridges. Distinct basi- 

 spenoid depressions are absent. In the species reaching Panama the 

 teeth are 28 in number, but vary in the genus to 26. 



Collection Mus. Comp. Zool. 



