COLOR PLATE VI 



THE COMMON TREE FROG. \_Hyla versicolor htConit.l 

 Any individual of this species passes through the color changes 

 indicated. The change from unspotted dark (not shown on plate) 

 to plain white or green is always through an intermediate spotted 

 phase. The frog of the upper three figures is from Staten Island, 

 N. Y.; the plain green one below from White Bear Lake, Minn.; 

 the other figures represent a frog from Providence, R. I. 



\^ 



