164 U.S. NATIONAL MUSEUM BULLETIN 2 88 



on the back of the female, opening posteriorly either by a round, 

 puckered aperture or by a longitudinal slit, but the pouch never a 

 slit-like trough as in Nototheca; adult male with a rudimentary pouch 

 on the back and a single, unpaired vocal pouch; vomerine teeth in 

 two short series; derm of the head may be co-ossified with the skull 

 or it may be free, in which case the roof of the skull is exostosed. 



Key to Colombian Species of Gastrotheca 



a 1 . Superciliary processes forming distinct triangular appendages on the upper 

 eyelids. 

 6 1 . Cranial derm co-ossified with roof of skull; well-developed dermal ap- 

 pendages on heels G. bufona 



b 2 . Cranial derm not fused with roof of skull; dermal appendages on heels 



tiny or absent G. cornutum 



a 2 . Without superciliary processes forming distinct triangular appendages on 

 upper eyelids. 

 b 1 . Cranial derm co-ossified with roof of skull; intersquamosal shelf complete 

 and forming a nearly straight posterior margin to skull. 

 c 1 . Tibia length distinctly more than one-half the distance from snout to 



tip of urostyle G. nicefori 



c 2 . Tibia length not more than one-half the distance from snout to tip of 



urostyle G. medemi 



b 2 . Cranial derm free from skull; intersquamosal shelf absent or incomplete 

 but not forming a nearly straight margin at back of skull. 

 c 1 . Dorsal pattern bright and conspicuous. 



d 1 . Dorsum dark with numerous, small, rounded light spots 



G. aureomaculatus 

 d 2 . Dorsum pale with a very conspicuous dark mid-dorsal stripe 



G. helenae 

 c 2 . Dorsal pattern somber or plain. 



d 1 . Size large (males 60-70 mm., females 70+ mm.) and belly not 



generally mottled G. mertensi 



d 2 . Size smaller (generally less than 60 mm.) and belly generally some- 

 what mottled G. monlicola argenteovirens 



Gastrotheca bufona, new species 



Figure 9 



Holotype. — MLS 344, an adult male from Ventanas (about 50 kilo- 

 meters [by road] northwest of Yarumal) Antioquia, Colombia, collected 

 by Hno. NiceToro Maria in 1963. 



Diagnosis. — A Gastrotheca with the upper eyelids bearing tri- 

 angular fleshy appendages, with dermal appendages on the heels, and 

 with the derm of the head co-ossified with the skull. 



This new species can be distinguished at a glance from all Colombian 

 Gastrotheca except cornutum by the well-developed superciliary dermal 

 process. It differs from cornutum in having the derm of the head co- 

 ossified with the skull. 



