FROGS OF COLOMBIA — COCHRAN AND GOIN 499 



crossbands on the left leg but not on the right. In one male there 

 are also dark bands across the left wrist. 



Remarks. — Other than the series of fresh specimens from Urrao, 

 we know of only one example (AMNH 1383), a female from Medellin, 

 Antioquia. Compared to the fresh specimens at hand from Urrao, 

 the Medellin frog seems somewhat mummified, but it is obviously 

 the same species. As is the case with the two females from Urrao, 

 the humeral spine is reduced and does not project through the skin 

 and into an antrum in the forearm as it does in the males. The Ameri- 

 can Museum specimen seems to have more slender appendages, but 

 this is most likely due to desiccation and shrinkage since the head- 

 and-body length is 55.2 millimeters, compared to 60.7 and 61.8 milli- 

 meters in the two fresh females at hand. 



The relatively small eyes alone are enough to set this off at once 

 from any other large tree frog known to us. 



It takes but a cursory examination of the large males of this species, 

 with their well-developed spines, to convince one that Noble (1920) 

 did well to set off the small, green (in life) centrolenids in a separate 

 genus. 



Specimens Examined 

 COLOMBIA 



Antioquia: Paramo Frontino, Urrao, 3,000 m., CNHM 69703-8; Medellin, 

 AMNH 1383. 



Genus Centrolenella Noble 



1920. Centrolenella Noble, p. 441 (type species, Centrolenella antioquiensis 

 Noble). 



Generic diagnosis. — Procoelous; arciferal pectoral girdle; disk-like 

 intercalary cartilages present between the ultimate and penultimate 

 phalanges; terminal phalanges T-shaped. 



This genus is distinguished from Centrolene by the small disks on 

 the tips of the fingers, which are much too small to cover the eye, 

 and by its much smaller size. 



Key to Colombian Species of Centrolenella 



a 1 . No vomerine teeth. 



b l . Dorsum with ground color well developed (generally lavender in preser- 

 vative) and much darker than ventral surfaces. 

 c 1 . Dorsum smooth, with no spiny, wart-like protuberances. 



d l . No sharp line of demarcation between dorsal and ventral ground 

 colors; web on lateral margin of third finger extending to base 



of penultimate phalanx C. antioquiensis 



d 2 . A sharp line of demarcation between dorsal and ventral ground 

 colors; web on lateral margin of third finger extending only to 

 middle of antepenultimate phalanx C. buckleyi 



