FROGS OF COLOMBIA — COCHRAN AND GOIN 85 



was collected by a member (French?) of the boundary commission, 

 which certainly visited the spot where the Sarare crosses the border 

 and there established the altitude (640 m.). 



The few specimens available do not throw much light on individual 

 variation, but they do indicate that the species is rather widespread. 

 The absence of the clavicles and procoracoids and the webbing on 

 the toes set this species off rather sharply from all Colombian micro- 

 hylids except Glossostoma aterrimum. Thus in Colombia there is only 

 one web-footed microhylid east of the Cordillera Oriental of the 

 Andes (Ctenophryne geayi) and one west of it (Glossostoma aterrimum). 

 The presence of the palatine bones in Glossostoma and the quite 

 different habitus of the two genera make them readily separable. 



The presence of webbed feet, a rather pale brown dorsum with a 

 middorsal pale hairline, and a venter of a brown darker than the 

 dorsum and separated from it by a rather sharp line of demarcation 

 seem to be rather uniform traits of the species. 



Specimens Examined 

 COLOMBIA 



Norte de Santander: Rio Sarare, MHNP 03-84 (holotype). 



Meta: Serrania de La Macarena, FM 357. 

 BRAZIL: Amazonas, region of Rio Livranents, AMNH 44787; Manjuru 



(region of Mau6s, middle Amazon), AMNH (unnumbered specimen). 

 BRITISH GUIANA: Kartabo, AMNH 23119, 71399, USNM 129533. 

 PERU: Inguitos, 350 ft., AMNH 42887; Peru-Brazil frontier (Utaquinia- 



Tapiche), AMNH 42685; Pampa Hermosa, Rio Cushabatay, 500 ft., AMNH 



42663. 



Genus Otophryne Boulenger 



1900. Otophryne Boulenger, p. 55 (type species, Otophryne robusta Boulenger). 



Generic diagnosis. — Clavicle and procoracoid present and nearly 

 straight. Palatines absent. Tympanum distinct. 



Only one species is known from Colombia. 



Otophryne robusta Boulenger 



Figure 5 



1900. Otophryne robusta Boulenger, p. 55 (type locality, Mt. Roraima, British 

 Guiana).— Nieden, 1926, p. 73.— Noble, 1931, p. 536.— Parker, 1934a, 

 p. 108.— Dunn, 1949, p. 2.— Carvalho, 1954, p. 3.— Rivero, 1961, p. 

 179.— Gorham, 1963, p. 26. 



Diagnosis. — Tympanum distinct; clavicle and procoracoid straight 

 and perpendicular to midline of pectoral girdle; palatine absent. 



Otophryne robusta can be easily distinguished from all Microhylid ae 

 now known from Colombia by its distinct tympanum and the straight 

 clavicles and procoracoids which are perpendicular to the midline of 

 the pectoral girdle. All other Colombian species have the tympanum 



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