Voice: Nothing on record. 



Breeding: They breed during April. The eggs are not yet described. 

 The tadpole is much like that of R. boy Hi sierrae. Its body is rather 

 flat, the tail musculature heavy and almost uniform in width for 

 about half the length of tail. Tooth ridges are variable, for example, 

 3/4 in one, 3-1/3 in another. Possibly they winter as tadpoles and 

 transform in the spring. They transform at about 4/5 inch (20 mm.). 



Notes: "Rana boylii muscosa inhabits the deeply cut valleys and 

 gorges, of the San Gabriel, San Bernardino and San Jacinto moun- 

 tains, from at least the Arroyo Seco Canon near Pasadena, on the 

 northwest, to Keen's Camp, Riverside County, on the southeast. It 

 readily climbs the steep rocks bordering the canon streams, employ- 

 ing for this purpose the enlarged tips of the digits, and sits far above 

 the water during the day; when alarmed it dives directly into the 

 stream, kicks up the silt with its hind legs, and buries itself in the 

 mud, so that pursuit is rendered difficult." — (Camp, 191 7, p. 120). 



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