FROGS OF COLOMBIA — COCHRAN AND GOIN 321 



Dimensions. — Head and body, 72.1 mm.; head length, 22.4 mm.; 

 head width, 23.4 mm.; femur, 37.3 mm.; tibia, 43 mm.; heel-to-toe, 

 52 mm.; hand, 21.8 mm. 



Color in alcohol. — A very dark brown frog with just a hint of darker 

 blotches on the back. Three fairly distinct broad crossbands can be 

 seen on each thigh with less-distinct broad crossbands on arms, 

 shanks, and feet. There are faint vermiculations of grayish brown 

 under the chin. The vocal sacs are black. The ventral surface is a dirty 

 brownish gray. 



Variation. — There is quite extensive variation in specimens of 0. 

 taurinus. 



We have seen four specimens (NR collection, type of depressa, Rio 

 Pastaza, Ecuador; ZMU 487 (2), Rio Vaupes, Brazil; and BM 1927.- 

 8.1.119, Buenavista, Bolivia) from the western part of the range of 

 taurinus that have a conspicuous yellow stripe down the back. This is 

 what Steindachner (1882, p. 64) called jlavolineatus and Andersson 

 (1945, p. 73) called depressa. The specimen (BM 1927.8.1.119) from 

 Buenavista, Bolivia, has a gray rather than brown ground color and 

 in this respect differs from all other specimens of taurinus we have 

 seen. 



At the other geographic extreme, the largest specimen of taurinus 

 we have seen (BM 1905.11.1.20), measuring 93 millimeters in head- 

 body length, is from Chenapoka, British Guiana. We have seen no 

 specimens from the western part of the range that reach this size. The 

 specimen from Chenapoka is heavily peppered with brown on throat 

 and chest, while most western specimens are immaculate or very 

 weakly mottled on those areas. 



We have no evidence that any of these variants represent geographic 

 races worthy of nomenclatorial recognition. 



Remarks.— The Indians in Vaupes, Colombia, know these frogs by 

 the common name "mamoen" and use them as food. 



Dr. Fred Medem has pointed out to us that, in life, these frogs have 

 green bones. 



Specimens Examined 

 COLOMBIA 



Amazon as: Rio Apaporis, MCZ 2S060. 



Meta: Serrania de La Macarena, BM 1956.1.16.2, CNHM 81332. 



Putumayo: Rio Mecaya, CNHM 69711-4. 



Vaup6s: Caiio Negro, aflucnte del Cubigu, FM (unnumbered), 7 specimens; 

 Gino-Goje, Lower Rio Apaporis, MCZ 28048. 

 BOLIVIA: Buenavista, BM 1927.8.1.119. 

 BRAZIL: Rio Vaupes, ZMU 487 (2). 



BRITISH GUIANA: Chenapoka, BM 1905.11.1.20-21; Demerara, BM 

 1878.12.13.18; Kartabo, USNM 118057. 



