Key 



B. Posterior femur unspotted; head shorter (one-fourth total length) ; muzzle 

 rounded; ear a vertical oval; size 3 inches. Texas. 



Lithodytes latrans. (See Coloxir Plate II, also p. 163.) 



II. Leg longer (length to heel equals length of body forward to eye, or some 

 point anterior) ; muzzle truncate in profile. 



A. Head longer than wide; sides somewhat tubercular; size small (i inch). 

 Florida. 



Lithodytes ricordii. (See p. 164.) 



FOURTH KEY. Species of Hylid^ {Tree Frogs) 



1. Disks on fingers and toes of medium or large size (never so small that they 

 are difl&cult to discern). 



A. Skin coarsely granulated above, Uke undersurface; fingers webbed; head 



broad, short; size 2 to 2^ inches. Florida* 



Hyla gratiosa. (See Colour Plate X, also p. 124. 



B. Skin rough, with small warts. 



1. Posterior surface of femur reticulated with yellow and black; size 2 



inches. Eastern North America. 



Hyla versicolor. (See Colour Plate VI, also p. 117.) 



2. Posterior surface of femur not reticulated or spotted; size ij inches 



Southwestern North America. 



Hyla arenicolor. (See Colour Plate X, also p. 122.) 



C. Skin smooth, or nearly so. 



I. Posterior surface of femur spotted or blotched. 



a. Head short, relatively narrow; body long; white spot under eye 

 and one at arm insertion; a black spot on shoulder; size 2 to 

 2 J inches. Mexico and Texas. 



Smilisca haudinii. (See Fig. 178, also p. 151.) 



h. Head broad, flat; form stout; upper surfaces grren, bounded with 

 line of white (even across wrists and heels); green extends in 

 scallop on throat; size ij inches. New Jersey and South 

 Carolina. 



Hyla Andersoiiii. (See Colour Plate VII, also p. 131.) 



c. Muzzle pointed, projecting much beyond the line of the jaw; 

 fingers not webbed; an oblique cross on the back; size i inch. 

 Eastern North America. 



Hyla pickcringii. (See Colour Plate X, also p. 138.) 

 46 



