1912] Taylor: Birds and Beptiles of Northern Nevada. 34!) 



situations. They are active and extremely shy. When once 

 startled Uta generally keeps running until it has reached a hiding 

 place, unlike certain other lizards, as Sceloporus or Crotaphytus, 

 which nearly always stop after running some distance, appar- 

 ently to see whether or not the intruder is still at hand. 



On June 20 a female containing three eggs with heavy shells 

 was secured. 



Sceloporus graciosus Baird and Girard 

 Mountain Lizard 



Distribution. — The widespread occurrence of this lizard is 

 best indicated by the following list of localities and specimens : 

 Winnemucca (4300 feet), 1; Virgin Valley (5000 feet), 2; Quinn 

 River Crossing (4100 feet), 23; Alder Creek Canon (6000 feet), 

 3 ; mouth Alder Creek (5000 feet) , 1 ; Big Creek Ranch (4350 

 feet), 3 ; Big Creek Canon (4800 to 6000 feet), 6; Leonard Creek 

 (5000 to 6500 feet), 3. The species was observed also at Amos 

 and at Leonard Creek Ranch. 



We found the mountain lizard in Upper Sonoran and Lower 

 Transition zones together with those species of birds and mam- 

 mals which C. H. Merriam (in Stejneger, 1893, p. 184) mentions 

 as being characteristically associated with it. 



The different habitats (in northern Nevada) of the two 

 species of Sceloporus taken by us may be understood from the 

 following table : 



Sceloporus graciosus Sceloporus biseriatus 



1. Typically ground-loving. 1. Typically roek-loving. 



2. Numerous on flats of open 2. None found on flats of open 



desert. desert. 



3. None found on rocks of lower 3. Found abundantly on rocks of 



slopes of foothills. Karer as lower slopes of foothills. More 



mountains were approached. numerous as mountains were 



approached. 



4. A few found on the broad arid 4. Not taken above 5000 feet alti- 



mountain valleys of Big and tude, so not so typically a 



Leonard cr.eeks at 6500 feet mountain-dwelling species, 



altitude, so more typically a 

 mountain-dwelling species. 



It should be remarked that while S. hiseriatus was not taken 



