REVISION OF THE KING SNAKES. 



167 



Range. — As here defined, gentilis occurs from western Utah and 

 southeastern Arizona east to the ninety-seventli meridian, north to 

 southern South Dakota, and south prohahly to northern Mexico. 



Besides the localities included in the accompanying list of specimens 

 Ellis (1913, 92) has recorded a few other stations for Colorado; Yuma; 

 Orchard; Clear Creek, near Golden; Beulah; and Baca County. 



Fig. 49.— Mj\j saowiNG locauty uscords for Lampkopeltis tkiangulum gsntilis. 



Variation. — Considerable variation with locality is indicated by 

 the ventral plates. The extremes and average for Kansas are about 

 the same as for sys'pila in that region ; the number is lower in Colorado, 

 and the few from west of the Rockies indicate a still greater reduction. 

 It will be interesting to see whether future specimens bear out the 

 unusual lack of variation in the four Utah specimens now on hand. 

 Subsequent proof of the existence of a distinct race west of the Rockies 

 would not be surprising, but the present material certainly would not 

 justify any separation. 



