V'OL. VIII] VAN DENBURGH AND SLEVIN— GARTER-SNAKES 253 



24. Cannell Meadows, Sierra Nevada, Tulare Co., Cal. 



25. Walkers Basin, Kern Co., Cal. 



26. Kern River, near Bodfish, Kern Co., Cal., at 2400 feet. 



27. Buena Vista Lake, Kern Co., Cal. 



28. Mt. Tallac, El Dorado Co., Cal. 



29. Fallen Leaf Lake, El Dorado Co., Cal. 



30. Fallen Leaf Lake, El Dorado Co., Cal. 

 3L Talioe City, Placer Co., Cal. 



32. Lake Tahoe. El Dorado Co., (?) Cal. 



33. Glenbrook, Douglas Co., Nevada. 



34. Wadsworth, Washoe Co., Nev. 



35. Pyramid Lake, Washoe Co., Nev. 



36. Owens Valley, Inyo Co., Cal. 

 Z7. Laws, Inyo Co., Cal. 



Material. — Sixty-seven specimens from these thirty-seven 

 localities have been included in this study. 



Variation. — Sixty-five specimens show the following varia- 

 tions : 



Loreal 1 — 1 in all specimens. Preoculars 1 — 1 in fifty-two, 

 or 81%; 2 — 2 in eleven, or 17%; and 1 — 2 in one, or 2%. 

 Postoculars 3 — 3 in fifty-six, or 89% ; 2 — 3 in six, or 9% ; and 

 2 — 2 in one, or 2%. Temporals l-f-2 — 1+2 in thirty-eight, or 

 60%; 1+3—1+3 in thirteen, or 20%; 1+2—1+3 in eleven, 

 or 17%; and 1+3 — 1+4 in one, or 2%. The supralabials are 

 8 — 8 in sixty-two, or 95% ; and 8 — 9 in three, or 5%. The in- 

 fralabials are 10 — 10 in forty, or 61%; 11 — 11 in twelve, or 

 18%; 9—10 in six, or 9%; 10—11 in five, or 8%; 11—9 in 

 one, or 2% ; and 9 — 9 in one, or 2%. The scale-rows are 21 — 

 19 — 17 in thirty-one, or 48%; 21 — 21 — 17 in twenty-four, or 

 38%; 19—21—19—17 in six, or 9%; 19—19—17 in two, or 

 3%; and 23 — 21 — 17 in two, or 3%. The gastrosteges vary 

 from 153 to 181, males having from 160 to 181, females from 

 153 to 177; the average in twenty-two males is 172.3, in forty- 

 three females, 167. The urosteges vary from 65 to 99, males 

 having from 77 to 99, females from 65 to 88; the average in 

 fourteen males is 88.4, in thirty-eight females, 81.7. 



This variation is shown in full in the following table of 

 scale-counts. 



