MEXICAN SNAKES AND CROCODILHANS — SMITH 

 Table 23. — Variation in Masticophis flagellum variolosus 



449 



Number 



Brit. Mus 



Brit. Mus 



U.S.N. M. No. 24681 

 Klauber No. 22650.. 

 Klauber No. 22715- . 

 U.S.N. M. No. 24680 

 U.S.N. M. No. 24682 

 Klauber No. 22685.. 



Brit. Mus 



Brit, Mus 



Brit. Mus 



Brit. Mus 



Brit. Mus 



Sex 



Ventrals 



192 



197 

 195 

 194 

 193 

 196 

 195 

 197 

 195 

 195 

 197 

 195 

 197 



Caudals 



125 

 128 



118 + 

 125 

 106 + 



111 + 



113 



117 



115 



113 



120 



MASTICOPHIS MENTOVARIUS MENTOVARIUS (Dumeril and Bibron) 



Masticophis mentovarius Smith, Journ. Washingtou Acad. Sci., vol. 31, pp. 388- 

 389, 1941. 



Eighteen specimens were collected : Chiapas : Zy 2 miles southwest of 

 Colonia Soconusco (No. 111269); Tonala (No. 111270). Oaxaca: 

 Tehuantepec (Nos. 111274-6; HMS Nos. 12082, 12293, 12450-3, 12476, 

 12761, 12775) ; Cerro de Huamelula (No. 111272) ; Mixtequilla (No. 

 111271) ; Cerro Arenal (No. 111273, HMS No. 18352). 



The Museum has three others, from Juchitan (No. 30231) and 

 Tehuantepec (Nos. 30422-3), Oaxaca. 



Data taken on 11 of this series show a constant scale row count of 

 17-13, supralabials 7-7 (except in one which has 6-6), preoculars and 



Table 24. — Variation in Masticophis mentovarius mentovarius 



