410 



PROCEEDINGS OF THE NATIONAL MUSEiUM 



found to vary from 65 to 79. The fact that these specimens repre- 

 sent practically all extremes of the range of Constrictor in Mexico, 



Table S. — Variation in Constrictor constrictor imperator 



1 Head oj 

 J Anal ar 

 • MiddU 



anal divided. 



