TREE-FROGS. 341 
is very beautiful, active, and hardy. The Versicolor Frog is a 
| native of North America, and ranges from Canada to perhaps as 
far south as Mexico. It is now fre yuently brought to England, 
where it can be bought, when in the market, for about 5s. It 
feeds at night, and is particularly fond of worms and cockroaches. 
This Frog has a circular tongue, slightly nicked, and free 
Fic. 84.—THE CHANGEABLE TREE-FROG (Hyla versicolor). 
behind ; a broad head and a round snout; and a very distinct 
tympanum, almost as large as the eye. Its fingers are webbed 
for nearly half their length, and its toes for nearly all. The 
disks of its toes are less than the size of its tympanum. It has 
an ankle fold. 
The upper surfaces of its body are covered with small warts, 
and its lower parts are granulated. Its colour above is greyish, 
