200 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4Tn Ser. 



32. Coulterville, Mariposa Co., Cal. 



33. Pleasant Valley, Mariposa Co., Cal. 



34. Marshy Meadow, Yosemite National Park, Cal. 



35. Klamath Falls, Klamath Co., Oregon. 



Material. — We have used one hundred and thirty-five speci- 

 mens in this study. 



Variation. — The loreal is 1 — 1 in all. The preoculars are 

 1 — 1 in all except one specimen with 1 — 2 and two with 2 — 2. 

 The postoculars are 3 — 3 in ninety-five, or 73%; 3 — 4 in 

 twenty-five, or 19% ; -I — 4 in seven, or 5% ; 2 — 3 in three, or 

 2% ; and 2 — 4 in one, or \7o. The temporals are 1+2 — 1+2 

 in one hundred and fourteen, or 88% ; 1+2 — 1+3 in eight, or 

 6%; 14-1—1+2 in three, or 2%; 1 + 1—1 + 1 in one, or 

 1%; 2+2—2+2 in one, or 1%; 1+3—1+3 in one, or 

 1%; and 1+2 — 2+2 in one, or 1%). The supralabials 

 are 7 — 7 in one hundred and four, or 80% ; 7 — 8 in 

 seventeen, or 13%; 8 — 8 in eight, or 6%; and 9 — 9 in one. 

 or 1%. The infralabials are 10 — 10 in one hundred and ten, or 

 85% ; 9—10 in thirteen, or 10%) ; 9—9 in three, or 2% ; 10—11 

 in two, or 1% ; and 9 — 8 in two, or 1%. The scale-rows are 

 19 — 19 — 17 in one hundred and thirty-four and 19 — 21 — 19 — 

 17 in one. The gastrosteges vary in number from 156 to 177, 

 males having from 161 to 175, females from 156 to 174; the 

 average in forty-seven males is 168.7, in eighty-one females, 

 163.7. The urosteges vary from 74 to 97, males having from 

 82 to 97, females from 74 to 93 ; the average in thirty-eight 

 males is 89.8, in fifty females, 82.8. 



These variations are shown in full in the following table of 

 scale-counts. 



