1912] Taylor: Birds and Reptiles of Northern Nevada. 343 



taken either in or near a small lake (altitude 8400 feet) near 

 Duffer Peak. 



The present record is the first known to the writer from 

 northern Nevada. The area in which the Pacific tree frog occurs 

 in greatest numbers is the Pacific Slope west of the Sierra Nevada 

 (Test, 1899, p. 480). The Government Death Valley Expedi- 

 tion (Stejneger, 1893, p. 222) recorded it in some numbers from 

 southern Nevada, and Test (1899, p. 490) in listing the speci- 

 mens in the National IMuseum mentions one example from Ogden. 

 l^tah. This author comments on the distribution of the species 

 and calls attention to the fact that it is semi-isolated in the 

 southern Great Basin mountain ranges ; and further, that the 

 manner of its spreading from place to place has not been ex- 

 plained satisfactorily. He suggests (p. 481) that the present 

 distribution of Hyla regilla may be accounted for through the 

 great inland lakes formerly existing in Panamint and Death 

 valleys, the species following the borders of the lakes and up 

 the streams flowing into them, and being left stranded where now 

 found. A similar suggestion may be offered for the presence of 

 the tree frog on the semi-isolated Pine Forest Mountains. The 

 waters of the irregular and extensive Pleistocene Lake Lahontan 

 bathed the lowermost slopes both of the Pine Forest Mountains 

 and of the Sierra Nevada, thus furnishing a continuous water- 

 front across all the territory intermediate between portions of 

 the range of Hyla regilla which are now discontinuous (namely, 

 the Sierra Nevada and Pine Forest IMountains). 



Hahits. — The individual taken on Alder Creek was caught in 

 a mouse trap set ten feet from the stream. Although they prob- 

 ably never get very far from w^ater, they evidently w-ander about 

 to a certain extent. Tadpoles and young tree frogs in various 

 stages of development were noted July 31 in the lake on Duffer 

 Peak IMeadow. 



Bufo boreas Baird and Girard 



^Mountain Toad 



Distribution. — The twelve examples of the mountain toad 

 secured were all taken in the higher parts of the mountains as 

 follows: Duffer Peak :\Ieadow (8400 feet), 5; head of Alder 



