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COLOR PLATE X 



To show possible coloration of some N. A. Hylas. In all cases 

 not only is there great power of change, but any pattern of spots 

 or bands on the top of the head and on the back is evanescent 

 in character. 



Fig. I. -THE SPRING PEEPER {Hyla pickermgii Siortr . 

 Providence, R. I.] Varies through many shades of ashy or 

 yellow brown. 



Figs. 2 and 3.— THE GREEN TREE FROG [Hyla cinerea 

 Daudin. Ft. Myers, Florida]. May be green or brown, 

 but is always known by the light bands. 



Fig. 4.— THE SOUTHERN TREE FROG [Hyla squirella 

 Bosc. Hitchcock, Texas]. 



Figs. 5 and 6.— THE SOUTHERN TREE FROG. Havelock, 

 N. C. These tree frogs vary through all shades of green, 

 gray and brown, and may be spotted or not. 



Fig. 7.— THE FLORIDA TREE FROG \Hyla gratiosa 

 LeConte. Orlando, Fla.]. May be green or brown, spotted 

 or not. It is often found with the change from green to 

 brown in process, in which case the frog is green conspicu- 

 ously spotted, but with brown gradually replacing the green 

 on the back. 



Fig. 8.— THE ARIZONA TREE FROG \Hyla arenicolor 

 Cope. Tucson, Arizona]. Can change from flesh color 

 through many shades of gray and brown, and may be 

 spotted or not. 



Refer to Index to locate descriptions. 



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