COLOR PLATE IX. 



Hyla Regilla Bd. and Gird. Carmel, Cal. 



Figs. I, 3 and 5 are photographs of the same male frog (all 



three photographs taken within ten minutes). Figs. 2, 4 



and 6 are a similar series of a female. 

 Hyla fegilla may change rapidly from a dark unspotted to a 



light unspotted condition, or the reverse order, through a 



vividly spotted phase of coloration. 



