20 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Seb. 



County, the valleys east of the Sierra Nevada in California, and 

 probably nearly all of Nevada; possibly Idaho and eastern 

 Washington. 



From Nevada, I have examined specimens of this subspecies 

 from Humboldt (Thousand Creek Flat, Virgin Valley, Big 

 Creek Pine Forest Mountains), Washoe (Pyramid Lake, 

 Nixon), Ormsby (Carson), Lander (Austin), Elko (Carlin) 

 and Esmeralda (Palmetto Mountains), counties. 



Californian specimens examined have been collected in Im- 

 perial (Silsbee), Riverside (Mecca), San Bernardino (Victor- 

 ville, Hesperia), Mono (Benton), Kern (Walker Pass, 

 Tehachapi Mountains, Isabella, Delano, Bakersfield, Button- 

 willow), and San Luis Obispo (Simmler, Pozo, Palo Prieto, 

 Shandon) counties. 



Variation. — Twenty-eight specimens from California and 

 western Nevada show the following variations : The loreals 

 are 1-1 in all. The preoculars are 2-2 in twenty-four, or 86% ; 

 1-2 in two, or 7% ; and 1-1 in two, or 7%. The postoculars are 

 3-3 in twenty-two, or 79% ; 4-4 in five, or 18% ; and 3-4 in 

 one, or 3%. The temporals are 3-4 in eleven, or 39% ; 4-4 in 

 five, or 18% ; 4-5 in four, or 14% ; 5-5 in three, or 11% ; and 

 2-3, 3-3, 3-5, 5-6, and 6-6, each in one, or 37o. The supra- 

 labials are 8-8 in seventeen, or 61% ; 8-9 in six, or 21% ; 9-9 

 in four, or 14% ; and 8-10 in one, or 4%. The infralabials 

 are 13-13 in thirteen, or 46% ; 12-12 in six, or 21% ; 12-13 in 

 four, or 14% ; 12-14 in two, or 7% ; 13-14 in two, or 7% ; and 

 14—14 in one, or 4%. The scale-rows are 33 in eleven, or 39% ; 

 31 in eleven, or 397o ; 35 in three, or 11% ; 29 in two, or 7% ; 

 and 37 in one, or 4% ; the average is 32.3 rows. The gastro- 

 steges vary in number from 223 to 263, males having from 224 

 to 252, females from 223 to 263 ; the average in twelve males 

 is 234, in sixteen females, 239. The urosteges vary from 50 to 

 72, males having from 58 to 72, females from 50 to 67; the 

 average in twelve males is 64, in fifteen females, 59. 



The dark blotches between head and anus in twenty-eight 

 specimens vary from 46 to 66, the average being 55. On the 

 tail they vary from 12 to 21, and average 15.4. The counts of 

 these blotches are shown in full below. 



