FROGS OF COLOMBIA — COCHRAN AND GOIN 



287 



Paraty pes— CNUM 81775-8, MLS 76 (8), USNM 152105-7, 

 152215-35, CJG 2337-9, all from Villavicencio, Meta; USNM 

 151962-3, from Kio Ariari, south of Villavicencio, Meta; USNM 

 152066-8, from Florencia, Caqueta. 



Diagnosis. — A small yellow frog of the microcephala group without 

 a distinct dorsal pattern but with large, dark, dorsolateral lymphatic 

 sacs that show through the dorsal skin and give a superficial appear- 

 ance of broad dorsolateral stripes. 



The absence of a distinct dorsal pattern serves to distinguish 

 H. maihiassoni at once from the related species in Colombia — H. 

 microcephala and H. riveroi. Also, the latter species do not have the 

 conspicuous dorsolateral lymphatic sacs of mathiassoni. 



Description oj holotype. — Vomerine teeth in two small, rounded 

 patches, lying close together between small, rounded choanae; tongue 

 three-fifths as wide as mouth opening, broadly rounded, its posterior 

 border fused and very shallowly notched. Snout short, U-shaped when 

 viewed from above, somewhat pointed in profile, the upper jaw ex- 

 tending considerably beyond lower; nostrils more lateral than superior, 



Figure 30. — Hyla mathiassoni, holotype, CNHM 81779 (x[3). 



