FROGS OF COLOMBIA — COCHRAN AND GOIN 483 



A female (MLS 128) from San Gil, Santander, differs from the Meta 

 and Boyaca frogs in having a slightly wider head and longer legs, but 

 until many more examples have been studied from San Gil the con- 

 stancy of these apparent differences cannot be estimated. 



We name this form for the late Dr. Emmett R. Dunn, whose interest 

 in Colombian herpetology preceded our own and whose collections 

 have been very useful. 



Other Specimens Examined 



(All Paratypes) 

 COLOMBIA 



Boyaca: Llanos de Boyacd, east of the Andes, USNM 147103-7 (juv.) ; Cafio 



de la Hermosa, CNHM 81917; Miraflores, USNM 153922-3. 

 Antioqtjia: Medellin, ANSP 24113-5. 



Meta: Acacias, USNM 147109-10, MLS 96b; Rfo Ocoa, south of Villavicencio 

 MLS 282 (juv.); Villavicencio, CNHM 81919, USNM 147249, MLS 130; 

 Granada on Rio Ariari, south of Villavicencio, USNM 151478-93. 

 Santander: San Gil, MLS 128. 



Genus Pleurodema Tschudi 



1838. Pleurodema Tschudi, p. 84 (type species P. bibronii Tschudi). 



Generic diagnosis. — Pupil horizontal. Tongue subcircular or oval, 

 free and entire or slightly notched posteriorly. Vomerine teeth present 

 or absent. Fingers free; toes free or webbed, often fringed; tips of digits 

 not dilated. Outer metatarsals united. Vomerine bone with a back- 

 wardly directed process; quadratojugal reduced or absent, if present 

 not reaching the maxillary. Omosternum cartilaginous; sternum with 

 a bony style which is usually single, sometimes furcate posteriorly. 

 Sacral diapophysis slightly dilated. Terminal phalanges simple. 



Two species are recognized from Colombia — one apparently quite 

 rare and the other fairly common and wide-ranging. They readily maybe 

 distinguished from each other by the presence or absence of vomerine 

 teeth and by other charactera 



Key to Colombian Species of Pleurodema* 



a 1 . Vomerine teeth present; toes not webbed; both metatarsal tubercles large and 



shovel-shaped P. brachyops 



a 2 . Vomerine teeth absent; toes webbed at base, with distinct fringes; a heavy 

 lunar inner metatarsal tubercle and a shovel-shaped outer one. P sagittifer 



Pleurodema brachyops (Cope) 



Plate 66a-c 



1858. Pleurodema bibroni, var. b. — Giinther, 1858, p. 32. 



1863. Pleurodema elegans (not of Bell). — Steindachner, 1863, p. 186, pi. 1, figs. 

 1-5; 1867, p. 14. 



•After Parker (1927). 



