FROGS OF COLOMBIA — COCHRAN AND GOIN 331 



the first, and with fingers and toes unwebbed except for a trace of web 

 between bases of third and fourth toes. 



P. bicolor can be distinguished from all other species of Phyllomedusa 

 now known from Colombia by having the second toe longer than the 

 first. It can be distinguished from Agalychnis spurrelli and A. calcarifer 

 by the absence of web between the fingers. 



Description. — UF 10020, from Leticia, Amazonas, Colombia. 

 Vomerine teeth in two short, rather heavy series, lying between the 

 rather large, ovate choanae; tongue three-fourths as wide as mouth 

 opening, broadly pear-shaped, its posterior border free and unnotched. 

 Snout short, truncate when viewed from above and truncate in profile, 

 the upper jaw extending beyond lower; nostrils lateral; slightly pro- 

 jecting, their distance from tip of upper jaw about one-half that from 

 eye, separated from each other by an interval equal to about two- 

 thirds their distance from eye. Can thus rostralis sharply defined; 

 loreal region slightly concave and practically vertical, the upper lip 

 not flaring out below it. Eye rather small for a frog of this size, not 

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

 membrane not reticulate; interorbital distance twice the width of 

 upper eyelid, which is about equal to distance between nostrils. 

 Tympanum moderately distinct, about three-fifths the diameter of eye, 

 separated from eye by a distance about equal to one-fifth its own 

 diameter. Fingers unwebbed, fourth finger considerably longer than 

 second, reaching middle of disk of third which just covers the tympanic 

 area; no projecting rudiment of a pollex, no ulnar ridge. Toes with 

 just a trace of web at base; second toe longer than first; third and fifth 

 toes subequal; disk of fourth toe covering about two-thirds the tym- 

 panic area; a distinct oval inner and a smaller but equally dictinct 

 rounded outer metatarsal tubercle; no tarsal ridge; no dermal appen- 

 dage on heel. Body rather elongate, in postaxillary region distinctly 

 narrower than greatest width of head; when hind leg is adpressed, 

 heel fails to reach the tympanum; when limbs are laid along the side, 

 knee and elbow fail to meet, when hind legs are bent at right angles 

 to body, heels overlap slightly. No patagium. Skin of upper parts 

 glandular; low, wide dorsolateral folds extending from behind eye to 

 region of sacral hump, posterior margin of tympanum bordered by 

 what appears to be a broad low-lying process of the dorsolateral 

 fold; skin of throat and chest fairly smooth, that of belly and lower 

 surface of thigh uniformly granular; no traces of a skinfold across 

 chest; adult male, no vocal sac apparent externally. Skin of head not 

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



Dimensions. — Head and body, 110.4 mm.; head length, 33.2 mm.; 

 head width, 43.7 mm.; femur, 42.5 mm.; tibia, 46.1 mm.; heel-to-toe, 

 73.2 mm.; hand, 35.1 mm. 



