NO. 5 MAMMALS OF PANAMA GOLDMAN 1 73 



the species of Saccoptcryx. It is smaller than the latter, however, and 

 easil}' distinguished by the huffy gray instead of glossy brown gen- 

 eral color, and the characters given for the genus. 



Fig. I. — Rhynchiscus naso priscus. 

 No. 179843, U. S. Nat. Mus. About nat. size. 



Specimens from Panama are apparently somewhat intermediate in 

 characters, but referable to this recently described subspecies, which 

 differs from typical R. naso of Brazil most notably in the form of the 

 anterior upper premolar. 



A colony of 13 individuals was found suspended from the under 

 side of a concrete bridge on the Panama Railroad about half a mile 

 north of Corozal. They occupied a strongly lighted space about two 

 feet in diameter, and were conspicuous against the light-colored 

 background of masonry. Ten specimens, now in the Field Museum 

 of Natural History, were collected at Lagartera on the Rio Trinidad 

 by Dr. S. E. Meek. 



Specimens examined: Corozal, 13; Lagartera, 10. 



Genus SACCOPTERYX Illiger 

 The sac-winged bats usually encountered belong to this genus. 

 Whitish dorsal stripes are present as in Rhynchiscus, but the tibia 

 and forearm are naked instead of clothed with grayish tufts of fur 

 as in that genus. Glandular sacs are conspicuous in the wings of the 

 males, but are less easily detected in those of the females. The genus 

 is similar to Centronycteris, but more robyst in general structure 

 and the skull differs in the greater lateral expansion of the lower 

 border of the orbit, which overhangs and hides the toothrow when 

 viewed from above. The ears are moderately long, narrow and 

 pointed. The teeth are 32 in number. Two species of the genus 

 range in Panama. 



SACCOPTERYX BILINEATA BILINEATA (Temminck) 



Greater White-lined Bat 



Urocryptus bilineatus Temminck, Vander Hoeven's Tijdsch. Natuurlij, 

 Gesch., Vol. 5, p. 33, pi. 2, figs. 3-4, 1838-1839. Type from Surinam, 

 Dutch Guiana. 



Like the still smaller species Saccopteryx leptura, which it very 

 closely resembles, this small bat has two white longitudinal stripes 

 near the center of the back. It is not unlike Rhynchiscus naso in the 



