108 



CALIFORNIA ACADEMY OF SCIENCES 



[Proc. 4th Ser. 



County, June 26, 1913. The others are all from Fort Douglas, 

 Salt Lake County 

 scale characters : 



The following table gives the variation in 



34. — Thamnophis parietalis (Say). 



The only specimen of this snake in our collections from Utah 

 is a female, No. 14169, secured near Fort Douglas, Salt Lake 

 County, in June or July, 1908. Its scales are in 19 rows, gas- 

 trosteges 166, urosteges 75, supralabials 7-7, infralabials 

 10-10, preoculars 1-1, postoculars 3-3, loreal 1-1, temporals 

 2+3-1+2, posterior genials longer. 



35. — Thamnophis vagrans (Baird & Girard). 



This snake evidently is much more abundant in Utah than 

 Thamnophis parietalis. We have 60 specimens. Nos. 14166, 

 38758 and 38759 were caught near Fort Douglas, Salt Lake 

 County. All the others were collected in Provo Canyon, Wa- 

 satch Mountains, Wasatch County, May 19 to June 20, 1913. 

 All show the typical coloration. Variation in scale characters 

 is given in the following table : 



