FROGS OF COLOMBIA — COCHRAN AND GOIN 



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moderate, very prominent, its diameter greater than its distance 

 from nostril; palpebral membrane not reticulate; interorbital distance 

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

 distance between nostrils. Tympanum distinct, about three-fifths 

 the diameter of eye, separated from eye by a distance nearly equal 

 to two-thirds its own diameter. Fingers webbed at base, fourth finger 

 considerably longer than second, just reaching to disk of third which 

 covers about one-half the tympanic area; no projecting rudiment of 

 a pollex; no ulnar ridge. Toes slightly more than one-half webbed, 

 the web on fourth toe reaching the base of the penultimate phalanx, 

 third and fifth toes subequal, disk of fourth toe covering about one- 

 third 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 about equal greatest width of head; when hind leg is ad pressed, 

 heel reaches to nostril; when limbs are laid along the side, knee and 

 elbow overlap considerably; 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 rather narrow glandular ridge passes above the tympanum; skin 



Figure 24. — Hyla labialis krausi, holotype, ZSM 102 (same size). 



