NEW BATS FROM PANAMA — HANDLEY 465 



Description: Body size small (forearm 37.5-38.5 mm., greatest 

 length of skull 20.2-20.9 mm.). Dorsal coloration yellowish brown, 

 brown (between Sudan Brown and Prout's Brown in holotype), or 

 grayish, paler anteriorly; a white median stripe extends from upper 

 back to base of tail; prominent white stripes above and below eye, 

 extending from noseleaf to crown at inner base of ear and from pos- 

 terior part of upper lip to outer base of ear; area about eye a little 

 darker than remainder of body; individual hairs of dorsum tricolored, 

 dusky at base, bufl'y medially, and brown or gray at tip; underparts 

 uniformly grayish or brownish gray, very slightly washed with whitish. 

 Membranes blackish; tragus and basal portion and margins of ear 

 yellow; tip of ear yellowish gray. Eye large; noseleaf broad, with 

 simple tip; interfemoral membrane hairy at base but naked on pos- 

 terior margin. Nasal aperture short, extending only to level of 

 anterior edge of orbits; supraorbital region scarcely ridged, but lachry- 

 mal region sharply ridged; sagittal and lambdoidal crests poorly de- 

 veloped; inner upper incisors slender; canines and P 4 low, but anterior 

 lower premolar (Pi) large and anterior cusp half or two-thirds the 

 height of P 4 . 



Measurements: Male holotype of gorgasi, followed by female para- 

 type (USNM 309902), and in parentheses the female holotype of 

 trinitatum: total length 56, 57 (-) ; hind foot 10, 11 (12); ear from 

 notch 17, 18 (15 in alcohol) ; forearm 38.5, 37.6 (41.0); tibia 12.4, 12.4 

 (15.2) ;calcar 4.9, 4.5 (4.5). Greatest length of skull 20.9, 20.7 (22.2); 

 zygomatic breadth 12.8, 13.1 (13.9) ; interorbital breadth 5.4, 5.6 (5.6) ; 

 braincase breadth 9.4, 9.6 (9.8); braincase depth 7.8, 7.9 (7.8); maxil- 

 lary tooth row length 7.3, 7.3 (7.7); postpalatal length 5.4, 6.0 (5.8); 

 palatal breadth outside of M 3 9.5, 9.4 (9.7); rostral breadth behind 

 canines 4.8, 4.9 (5.1). 



Comparisons: The closest relative of gorgasi appears to be trinita- 

 tum Goodwin, which is known only by the type specimen from Trini- 

 dad. Together these species stand well apart from all other known 

 Chiroderma, and additional collecting may show them to be conspecific. 

 C. gorgasi may be distinguished from trinitatum by smaller size; 

 relatively broader skull; relatively deeper braincase and more bulging 

 forehead; shorter rostrum; sharper lachrymal ridge; more rounded 

 supraorbital region; heavier zygomata; larger outer upper incisors 

 (I 2 ); shorter (anterior-posterior) M 1 . Coloration of trinitatum is 

 unknown. 



The facial stripes, small size, low canines and P 4 , large Pi, short 

 nasal aperture, and lack of a supraorbital ridge are characters of 

 gorgasi that distinguish it from the sympatric lyillosum Peters and 

 salvini Dobson. 



