174 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 



arrangement of the stripes, but is larger (forearm about 47.5 mm.) 

 and the general color glossy brown or black instead of buffy gray. 

 The males possess a well-developed glandular sac in the antebrachial 

 membrane near the inner side of the forearm ; in the females this 

 sac may be difficult to find. Specimens from Panama appear to 

 represent typical 6". bilineata and differ in larger size from examples 

 of S. b. centralis from Mexico. This difference seems most notice- 

 able in the skulls. 



Fig. 2. — Saccopteryx bilineata bilineata. 

 No. 179849, U. S. Nat. Mus. About nat. size. 



Near Gatun a colony of 15 of these bats was found in the space 

 between the projecting buttresses on the trunk of a large tree in the 

 forest. They were clinging to the bark about 10 feet from the ground 

 and in plain view. At Tabernilla half a dozen were located in the 

 open smokestack of an old French dredge which had beeen aban- 

 doned and was lying in second growth forest near the railroad. They 

 were irregularly distributed over the smooth inner surface and 

 hanging motionless with their muzzles somewhat elevated or point- 

 ing outward, beyond the plane of their backs. Bats of this species 

 were discovered under shelter of the high arch of the natural bridge 

 over the Rio del Puente, a few miles north of Alhajuela. Here they 

 were grouped in dark recesses from which they were dislodged by 

 shooting. A specimen picked up from the ground where it had 

 fallen with the others proved to be Peropteryx canina. A few greater 

 white-lined bats were also obtained from crevices in a small well- 

 lighted cave in the cliff forming the coast line a short distance west 

 of the entrance to the Panama Canal at Balboa. Clinging in or near 

 the same crevices in the cave walls were a few Hemiderma p. aztecum 

 and Glossophaga soricina leachii. 



On Taboga Island August Busck met with S. b. bilineata clinging 

 to sun-exposed rocks at the entrance to a cave. None were found 

 beyond the entrance. Anthony (1916, p. 373) records a specimen 

 taken by W. B. Richardson at Cituro. 



Specimens examined : Alhajuela, 2 ; Balboa, 1 ; Cana, 1 ; Cerro 

 Azul, 1 ; Cituro, 1 ' ; Gatun, 5 ; Rio del Puente (natural bridge north 

 of Alhajuela), 6; Tabernilla, 1 ; Taboga Island, 10. dj 



1 Collection Amer. Mus. Nat. Hist. 



