40. THAMNOPHIS 



801 



...i....i. 



;. : 



- -i ; 

 : 



-' 4-}.-f.-fvi-f -4 "j -4- j..-*.~f ] ;....4....j -.... J....+...4- .*- -f- 



i ' jt ;- }-* r~T' 



;... ;. -..4.4... ... .;....; 4.. i ../.I. ;...{?. ;.. .;. ...i 4.....L..f ., r _. t ~ i 



jar-i rHiiitF""til?t'i 



-fl ..,...,... i....;.._i....i...i... f .. .;.../..,. 4../...L... I...... .. + .-.*_, .v.. t -|..*.. t . t 



,....,...,... 



' -i r-t 



fffttri 



rtTn 



H i -\ h-4 i f--j.-4~j..4-f~*-l 



. 4..,.. H ... H ..44 .1 



>!-< j | i i..-^....;.-..|...j...:..^. 



H 4 



L.L..14 







i ^ 



---^ 



i vf 



. ^. ..j. 



. \. -.': 

 . 4...J. 



; I I 

 ..i..._.i...4. T i...^...4. -f .j. 



[44;}., 



4-_i..;4....^....^. ij....>_^i ...;.- 



; ....:. . i...|....;...j...i....|. .4....^.. 

 t i : . j : - 



H 



I-.S 



iH*i 



j r-f 



; , ...: ..;. .:. J...4.4.4..J 



flf 



. . - . .; .^ . .;... . I 



! -. -- . 



..i. .{..4.4.4 4-4- < 



I t : i : : : 



,..;.., .... 1 .. t ...| 



,,.; 



mj 



144.44. 



.;...!....;....; 1..J 



f44..|4 \ 



:. r .., .,..., 



f r-t ' 



... .., .,....;.... 

 t I R" 



Figure I 



Fig. 1. This chart shows the number of gastrosteges in specimens of Thamnopfiis 

 tirtalii concinnui. represented by a continuous line, and Thamnophis sirtalii infernalis. 

 represented by a broken line. The upper half of the chart shows the counts in males, 

 the lower half the counts in females. The chart shows the percentage of the total number 

 of specimens of each sex having each number of gastrosteges. and brings out clearly the 

 fact that in T. s. infernalis these scutes are more numerous than in T. s. coneinnus. 



T. sirtalis coneinnus may be readily distinguished from 

 T. ordinoides ordinoides of the same regions, by its larger 

 eye, and more numerous scales 



Habits. This snake probably does not differ in habits 

 from its close relatives. 



