Vol. VIII] VAN DENBURGH AND SLEVIN— GARTER-SNAKES 



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The gastrosteges vary in number from 151 to 183, males hav- 

 ing from 157 to 183, females from 151 to 176; the average in 

 one hundred and twenty males is 171, in one hundred and 

 twenty-three females, 166. The urosteges vary from 63 to 97, 

 males having from 76 to 97, females from 63 to 91 ; the aver- 

 age in one hundred and twelve males is 84, in one hundred and 

 three females, 77. These variations are shown in full in the 

 following table of scale-counts. 



Scale counts in Thamnophis ordinoides hiscutatus (Cope) 



