FROGS OF COLOMBIA COCHRAN AND GOIN 319 



vocal sac at each angle of jaw but apparent only on dissection. Skin 

 of head not co-ossified with skull, roof of skull weakly exostosed. 



Dimensions. — Head and body, 48 mm.; head length, 17 mm.; 

 head width, 17.1 mm.; femur, 22.7 mm.; tibia, 27 mm.; heel-to-toe, 

 35.3 mm.; hand, 14.7 mm. 



Color in alcohols — Very dark brown above with indistinct scattered 

 blotches of deep chocolate brown. A rather distinct series of black, 

 sometimes ocelli-like, spots along each side between axilla and groin. 

 Indistinct crossbars on upper surfaces of arms and legs. Entire ventral 

 surface a dull, dirty brown. The numerous white-tipped warts on the 

 dorsum and top of legs give this individual a speckled appearance. 



Remarks.— When we first examined one of the specimens we felt 

 sure we had Melin's Hyla britti at hand, but on direct comparison with 

 the type of britti the two proved to be different. After studying the 

 type of Hyla orcesi (SUNHM 13150) we have no doubt that the speci- 

 mens at hand are orcesi and that britti is a different, probably valid, 

 species. 



The five specimens we have seen range from 47.3 to 54.6 millimeters 

 in head-body length. 



Specimens Examined 

 COLOMBIA 



Huila: Acevedo, Rio Suaza, near San Adolfo, CNHM 69709-10. 

 ECUADOR: Napo-Pastaza Province, Suno drainage, tributary of Rfo Cotapino, 

 SUNHM 13150 (type); Abitagua, Oriente, Rio Pastaza basin, CNHM 

 25791, 27619. 



Osteocephalus taurinus Steindaehner 



Plate 38d-f 



1862. Osteocephalus taurinus Steindaehner, p. 77 (type locality, Rfo Negro, 

 Brazil).— Boulenger, 1882a, p. 363; 1884a, p. 637.— Goin, 1961, p. 13. 



1862. Osteocephalus flavolineatus Steindaehner, p. 80 (type locality, Cocuy, 

 Brazil). 



1867. Trachycephalus taurinus. — Steindaehner, 1867, p. 64. — Miranda-Ribeiro, 

 1926, p. 94.— Melin, 1951, p. 38. 



1867. Trachycephalus flavolineatus. — Steindaehner, 1867, p. 64. 



1898. Hyla taurina.— Boulenger, 1898b, p. 133.— Baumann, 1912, p. 163.— Beebe, 

 1919, p. 208.— Ruthven, 1919, p. 9.— Nieden, 1923, p. 303.— Lutz, 

 1927, p. 40.— De Witte, 1930, p. 14.— Crawford, 1931, p. 33.— Parker, 

 1935, p. 512.— Melin, 1941, p. 38.— Schmidt and Inger, 1951, p. 447 — 

 Lutz and Kloss, 1952, p. 654.— Rivero, 1961, p. 110. 



1904. Hyla taurinus. — Peracca, 1904, p. 37. 



1945. Hyla depressa Andersson, p. 73 (type locality, Ecuador, Rio Pastaza 

 watershed). — Gorham, 1963, p. 22. 



Diagnosis.- — A large Osteocephalus with the skull strongly exostosed 

 and with numerous small, wart-like spines on the back which give 

 the dorsum a sandpaper-like effect. 



