FROGS OF COLOMBIA — COCHRAN AND GOIN 169 



when hind leg is adpressed, heel reaches well past tip of snout; when 

 limbs are laid along the side, knee extends to axilla; when hind legs 

 are bent at right angles to body, heels considerably overlap. No 

 patagium. Skin of upper parts smooth. There are eight series of tiny, 

 wart-like structures in inconspicuous transverse rows across the back; 

 the first of these rows is between the eyes, the last row just dorsal to 

 the vent. Dorsal skin above lumbar region very flat medially, with 

 raised ridges of skin along each side forming an incipient pouch, as 

 is characteristic of male Gastrotheca. There is a spine of skin forming 

 a supraorbital spine projecting outward from each upper lid; skin 

 heavily folded along sides; a rather narrow glandular ridge encircles 

 upper part of tympanum; skin of throat and chest smooth, belly and 

 lower femur uniformly granular; no traces of a skinfold across chest; 

 vocal sac not apparent. Derm of head not fused with cranium but 

 dorsal surface of cranium exostosed; intersquamosal shelf incomplete 

 and not forming a straight posterior margin at the back of the skull. 



Dimensions. — Head and body, 58.5 mm.; head length, 17.2 mm.; 

 head width, 19.3 mm.; femur, 27.4 mm.; tibia, 30.2 mm.; foot, 37.7 

 mm.; hand 12.5 mm. 



Color in alcohol. — A dark frog with little discernible pattern. 

 Dorsum a uniform dark brown. Thigh a lighter brown with four 

 narrow dark brown crossbands. Indistinct black dots present on the 

 folded skin along the sides. Indistinct but discernible dark blotches 

 on the upper lip. Entire ventral surface dark but not so dark as the 

 dorsum. 



Remarks. — It was with hesitation that we referred this Colombian 

 specimen to the species G. cornutum. On direct comparison with the 

 type of cornutum (a female), this specimen (a male) differs as follows: 

 in its smaller size (47.6 mm. in head-body length as against 76.2 mm. 

 for the type); in not having the parietal marginal walls nearly so 

 elevated; in having well-developed trace of web between third and 

 fourth toes (absent in the type); in having knee reach to axilla (to 

 elbow in the type) ; in having seven definite rows of warts transversely 

 across back (absent in the type) ; and in being in general a more 

 slender frog, although this may be sexual dimorphism. The type has 

 a small but very distinct dermal heel appendage. 



There are striking differences in color. The type is a pale frog with 

 tannish yellow dorsal ground color; a dark brown stripe originates 

 at tip of snout, passes upward between the nares, posteriorly between 

 the eyes and parietal ridges, and along the median line of the back 

 to the upper margin of the egg sac opening; another dark stripe 

 originates behind the eye, passes posteriorly above the tympanum 

 and along the side to the lateral margin of the egg sac opening; 

 below this lateral stripe, the color fades into the ventral ground 



