464 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



Description: Coloration shiny blackish (between Blackish Brown-3 

 and Black) throughout; individual hairs of dorsum pale grayish on 

 basal two-thirds, those of underparts black to base. Pelage short 

 and crisp ; interf emoral membrane reduced to a narrow, densely furred 

 band; tail present. Skull most like that of Anoura geoffroyi, but dif- 

 fering as follows: larger; braincase more tapering anteriorly; rostrum 

 thickened; zj^gomata complete; posterior margin of palate more deeply 

 incised beside posterior palatal extension; pterygoids inflated pos- 

 teriorly so as to narrow the elongated mesopterygoid fossa. Sym- 

 physial region of mandibles shortened and trough between canines 

 deepened and broadened (anterior end of mandible correspondingly 

 depressed) ; coronoid process reduced in height ; ventral edge of man- 

 dible with a low process just anterior to the angular process. Outer 

 upper incisor (I 2 ) enlarged, bladelike; upper canine enlarged, roughly 

 triangular in cross-section at base, with distinct anterointernal, antero- 

 external, and posterior basal cusps; internal face anteroposteriorly 

 concave, and anterior face flat, with prominent longitudinal sulcus 

 from base of crown to near tip , P 3 and P 4 reduced in height and thick- 

 ness and in prominence of cusps; M 2 and M 3 reduced in size; lower 

 canine reduced in height, with distinct cingulum on anterior and in- 

 ternal faces, and with a posterointernal cingular cusp ; anterior lower 

 premolar (P x ) bladelikc and enormously enlarged (lengthened and 

 thickened), with its highest point in the posterior half of the tooth; 

 P 3 and P 4 reduced in height and thickness and in prominence of cusps. 



Measurements (holotype): Total length 94, tail vertebrae 6, hind 

 foot 14, ear from notch 16, forearm 43.2, tibia 15.9, calcar 3.8. Great- 

 est length of skull 26.3, zygomatic breadth 10.7, interorbital breadth 

 4.7, braincase breadth 10.3, braincase depth 8.0, maxillary tooth row 

 length 9.0, postpalatal length 9.4, palate breadth outside of M 3 5.7, 

 rostral breadth at base of canines 4.7. 



Comparisons: Probably the closest relative of cultrata is Anoura 

 geqffroyi, but as indicated in the description above it is strongly dif- 

 ferentiated from this species in many characters. 



Specimens examined: Panama: Tacarcuna Village, 3,200 ft., Rio 

 Pucro, Darien, 8, USNM. 



Chiroderma gorgasi, new species 



Holotype: USNM 309903, adult male (testis 6x3 mm.), skin 

 and skull, collected March 6, 1959, by Charles O. Handley, Jr., and 

 B. R. Fcinstein, Tacarcuna Village, 3,200 ft., Rio Pucro, Darien, 

 Panama, original number 5436. 



Distribution: Known only from the type locality in eastern Pan- 

 ama, where five individuals were caught in February and March 1959 

 in mist nets set over a stream in a mountain forest. 



