Nevada Frog. 



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Plate LXIX. i. Male 

 (X-f). 2,3,4. Females (xf). 

 Rana onca Cope. 

 Range: Utah and Nevada. 



Habitat: Spring basins or 

 trickling streams in springy 

 fields. Isolated in such spots 

 because of surrounding desert. 



Size: Adults, 1 3/4-3 

 inches. (Males, 44-64 mm. 

 Females, 46-74 mm.). 



General appearance: This 

 spotted frog with light stripes 

 along the dorsolateral folds, 

 is very similar to R. pipiens 

 or R. palustris or R. septen- 

 trionalis. The chamois or 

 honey yellow of the hind legs 

 is very prominent in both 

 male and female, reminding 

 one of R. palustris. The fe- 

 males are more spotted than 

 the males. The upper parts 

 are olive green, the males 

 showing a tendency toward 

 self color in the forward part 

 of body. This forward part 

 may be a brighter green. In 

 the groin and on the front 

 and rear of the hind legs are 

 many reticulations of deep 

 olive and pale olive gray. 



Structure: Thumb enlarged 

 in males; tympanic disk large 

 and larger in males than fe- 

 males. Old males may be 

 smooth, but younger ones 

 may be more warty than cor- 

 responding females. 



Voice: August 20, 1925. 

 Las Vegas, Nev. When I 

 picked up the tenth one, he 



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