292 U.S. NATIONAL MUSEUM BULLETIN 288 



Colombia. Vomerine teeth in two tiny rounded patches lying between 

 the small, rounded choanae; tongue one-half as wide as mouth opening, 

 broadly cordiform, its posterior border very slightly free and un- 

 notched. Snout short, rounded when viewed from above, truncate 

 in profile, the upper jaw extending but very slightly beyond lower; 

 nostrils more lateral than superior, slightly projecting, their distance 

 from end of snout about one-third that from eye, separated from each 

 other by an interval equal to about two-thirds their distance from eye. 

 Can thus rostralis well defined; loreal region flat and very nearly 

 vertical, the upper lip not flaring out below it. Eye moderate, not 

 particularly prominent, its diameter equal to its distance from nostril; 

 palpebral membrane not reticulate; interorbital distance slightly 

 greater than width of upper eyelid, which is slightly greater than 

 distance between nostrils. Tympanum distinct, about one-third the 

 diameter of eye, separated from eye by a distance about equal to its 

 own diameter. Fingers webbed at base, web extending to distal third 

 of antepenultimate phalanx of third finger; fourth finger considerably 

 longer than second, just reaching to disk of third which just covers the 

 tympanic area; no projecting rudiment of a pollex; no ulnar ridge. 

 Toes more than one-half webbed, the web on fourth toe reaching 

 base of penultimate phalanx, third and fifth toes subequal, disk of 

 fourth toe covering about two-thirds the tympanic area; a distinct 

 oval inner and a smaller but equally distinct rounded outer metatarsal 

 tubercle; no tarsal ridge; no dermal appendage on heel. Body not 

 elongate, in postaxillary region a little narrower than greatest width 

 of head; when hind leg is adpressed, heel reaches anterior margin of 

 eye; when limbs are laid along the side, knee and elbow overlap con- 

 siderably; when hind legs are bent at right angles to body, heels 

 overlap greatly. A patagium extends from the back of the upper arm 

 to the side of the body. Skin of upper parts smooth; a glandular ridge 

 encircling upper part of tympanum, then passing downward to 

 terminate above arm; skin of throat and chest smooth, that of belly 

 and lower surface of thigh uniformly and very finely granular; a well- 

 developed skinfold across chest; adult female, no vocal sac. Skin of 

 head not co-ossified with skull, roof of skull not exostosed. 



Dimensions. — Head and body, 26.8 mm.; head length, 10.6 mm.; 

 head width, 10 mm.; femur, 13.6 mm.; tibia, 16.1 mm.; heel-to-toe, 

 21.6 mm.; hand, 9.4 mm. 



Color in alcohol. — Dorsally a rich chocolate brown with a distinct 

 pattern of faded creamy white. This dorsal pattern consists of a sharply 

 defined pale white area that extends from the nostrils along the can- 

 thus to anterior corner of eye, includes all of upper lid and continues 

 posteriorly from corner of eye above the tympanum to a point just 



