Hyla evittata 



cinerea. Ear medium in size, a distinct fold of skin over it from 

 eye to shoulder. A fold across the breast. Proportions and 

 characteristics of extremities like those of Hyla cinerea. (See 

 Figs. 1 54 to 1 60, and p. 126. Compare Figs. 161 to 164 with Figs. 

 154 to 160.) 



Range: Hyla evittata has been reported only from the region 

 about Washington, D. C, but is likely to be found also from Long 

 Island Sound to Chesapeake Bay in regions near the coast. 



The type specimens of Hyla evittata Miller were found in 1898 

 at Four Mile Run, Virginia. Before that date, the species, when 

 found, had been supposed identical with the well-known Hyla 

 cinerea. The resemblance of the two tree frogs is remarkable. 

 The distinction can always be made without difficulty, however, 

 since Hyla evittata lacks the outlining bands of white and has a 

 thicker and less pointed head. Moreover, the skin of Hyla evittata 

 is smoother than that of Hyla cinerea and has the appearance 

 of being even smoother than it is, because this tree frog always has 

 a shining, wet-looking surface. This characteristic of the skin 

 makes the frog look as though it were moulded from smooth 

 green wax. Again Hyla evittata has a marked tendency to display 

 blue -green shades in its dress, while Hyla cinerea tends decidedly 

 toward the yellow-greens. 



It is unusual to see any creature displaying everywhere so 

 even a colour. The colour may be a little deeper or a little more 

 blue along the middle of the back, on the head, and on the tibia, 

 but otherwise there is likely to be no variation. The flecks of 

 orange set in the vivid green make a brilliant display under a lens, 

 but they are too small to make any impression on the naked eye. 

 There are no colour lines for the canthus rostralis, none for the 

 line of the jaw or for the fold over the ear; in fact, every feature 

 so familiar in the colour patterns of other frogs is lacking here. 

 No other tree frog in North America shows so conspicuously the 

 dividing line between the vividly coloured parts exposed to light 

 and the white or colourless parts concealed in resting position. 

 There are not only the abrupt dividing lines on the sides and along 

 the margins of each joint of arms and legs, but on the throat and 

 hands and feet, also, the lines are conspicuous. The white extends 



129 



