FROGS OF COLOMBIA — COCHRAN AND GOIN 455 



As labyrinthicus (Spix) from eastern Brazil seems to be fairly well 

 characterized, it is not included above. 



Colombian Specimens Examined 



Amazonas: Leticia, MLS 271 ,USNM 147053, UF 8536; Rio Apaporis, USNM 



144847. 

 CaqtjetX: Florencia, MLS 293 (juv.); 4 km. east of Florencia, MLS 472; Rio 



Mecaya, 185 m. CNHM 69752. 

 Choc6: Boca de la Raspadura, AMNH 39792. 

 Huila: Pitalito, 1,350 m., CNHM 69745. 

 Meta: Menegua, east of Puerto L6pez, upper Rio Meta, USNM 147272; Rio 



Guayabero, Angostura Camp No. 1, USNM 150490; Serrania de La Macarena, 



Rio Guapaya, 330 m., CNHM 81337; San Juan de Arama, Los Micos, 



400 m., CNHM 81329. 

 Valle: Lower Rio Calima, USNM 145094, 150756; Virology Field Station, Rio 



Raposo, USNM 151460-2. 



Leptodactylus rhodomystax Boulenger 



Plate 61g-i 



1884. Leptodactylus rhodamystax Boulenger, 1884a, p. 637 (type locality, Yuri- 

 maguas, Huallaga River, northern Peru) ; 1886b, p. 413. — 'Nieden, 

 1923, p. 481.— L. Muller, 1923, p. 46.— Parker, 1935, p. 508.— Rivero, 

 1961, p. 37.— Gorham, 1963, p. 19. 



Description. — BM 1939.1.1.38, an adult female from New River, 

 British Guiana. No bony ridges on top of head. Vomerine teeth in 

 two transverse, short, arc-shaped series, nearly touching each other 

 behind the choanae; tongue two-thirds as wide as mouth opening, 

 cordiform, its posterior border free and slightly notched; snout 

 broadly rounded when viewed from above, rounded in profile, the 

 upper jaw extending well beyond the lower. Nostrils dorsolateral, 

 slightly projecting, their distance from end of snout almost twice 

 their distance from eye. Can thus rostralis bluntly rounded; loreal 

 region concave, sloping outward to meet the upper lip. Eye large, 

 prominent, its diameter three-fourths its distance from tip of snout; 

 interorbital diameter equal to that of upper eyelid, equal to interval 

 between nostrils. Tympanum distinct, its greatest diameter two- 

 thirds that of eye, separated from eye by an interval equal to two- 

 thirds its own diameter. Fingers rather short except for first finger, 

 which is equal to third and much longer than second, with slight 

 lateral ridges, free, their tips distinctly dilated into small round 

 disks, disk of first finger covering about one-eighth the tympanum; 

 a heavy projecting thumb pad present; a smaller flat palmar callus; 

 metacarpal tubercles well developed. Toes long, third toe much 

 longer than fifth, its disk reaching beyond base of antepenultimate 

 phalanx of fourth; disk of fourth toe covering about one-eighth the 

 tympanum and equal to that of first finger; a small but heavy oval 



