40. Length of leg to heel (when extended forward) equal or less than the 



distance from the eye backwards 41. 



Length of leg to heel longer than the distance from the eye backwards 42. 



4 1 . Color on back in dark blotches; Kansas to Texas 



Pseudacris nigrita clar\ii (Baird) Clark's Chorus Frog 

 Color on back arranged as more or less well defined stripes; N. Y. to 

 to Ari2;ona and Idaho 



Pseudacrjs nigrita triseriata (Wied) Striped Tree Frog 



42. Color on back usually in dark lengthwise bands; back smooth; Penna. to 



Florida 



Pseudacris feriarum (Baird) Eastern Swamp Cricket Frog 

 Color on back usually as rows of spots; back tubercular 43. 



43. With a light line along the upper jaw; S. C. to Florida and Mississippi 



Pseudacris nigrita nigrita (Le Conte) Swamp Cricket Frog 

 Upper jaw spotted or barred; Florida 



Pseudacris nigrita verrucosa (Cope) Florida Swamp Cricket 

 Frog 



44. With inconspicuous pads on ends of fingers and toes; rear of thigh with 



alternating light and dark bars; back with lengthwise dark markings; 

 adults seldom much over an inch long 45. 



Pads on ends of fingers and toes more distinct; rear of thigh without al' 

 ternating light and dark bars; size larger, except for H. crucifer, which 

 has a dark, cross'shaped marking on the back 46. 



45. Web on hind foot extending almost to the end of the longest toe; length 



of leg to heel (when extended forward) shorter than head and body; 

 east of the Rockies 



Acris crepitans Baird Cricket Frog 

 Web on hind foot shorter; length of leg to heel extending forward to 

 beyond snout; coastal regions from Virginia to Louisiana 



Acris gryllus (Le Conte) Southern Cricket Frog 



46. Discs on the fingers extremely large, quite as large as the tympanum; skin 



of the head grown to skull; southern Florida 



Hyla septentrionahs Boulenger Giant Tree Frog 

 Not so 47. 



47. With very short webs between the fingers 48. 

 No webs between the fingers 56. 



48. Back coarsely granulated, like the belly; Tenn. and S. C. to Florida and 



Louisiana 



Hyla gratwsa Le Conte Barking Tree Frog 

 Back smooth or rough, but not with the same granulated structure as the 

 belly 49. 



49. Body extremely slender; length three times or more width through the 



area of the tympanum; back plain green or with a few light spots 62. 

 Body moderately slender; back with changeable dark markings 50. 



50. No dark band back through the tympanum; rear of thighs plain yellowish; 



Utah to Cal. and Texas 



Hyla arenicolor Cope Canyon Tree Frog 



348 



