With a dark band on each side of the head back through the tympanum; 

 rear (concealed) surfaces of thighs Hght spotted or with dark blotches, 

 frosting or network 51. 



51. No light spot below the eye; rear of thigh usually light spotted or plain 



52. 



Usually with a distinct light spot below each eye; rear of thigh usually 



spotted or reticulated with dark, which may give the appearance of 



light spots on a darker background 53. 



52. Rear of thigh brown, with definitely rounded yellow or orange spots; legs 



short; length of leg to heel scarcely reaching forward to the eye; Vir' 

 ginia to Florida and Texas 



Hyla femoralis Latreille Pine Woods Tree Frog 

 Rear of thigh usually plain yellowish; legs longer; length of leg to heel 

 reaching forward to a point before the eye; Arizona and New Mexico 

 Hyla wrightorum Taylor Wrights' Tree Frog 

 (Hyla eximia Baird (part) ) 



53. Dark band through the tympanum turning downward on the shoulder; 



with a white ring around the insertion of the arm; southern Texas 

 Hyla haudinii haudinii (D. &? B.) Mexican Tree Frog 

 Dark band through the tympanum not turning downward on the shoul' 

 der 54. 



54. Thighs greenish, with a darker network; eyes protruding well beyond the 



line of the jaw when viewed from above or below; voice like a bird's 

 whistle; 111. and Tenn. to Florida and Louisiana 



Hyla avivoca Viosca Bird-voiced Tree Frog 

 Thighs with yellow and brown reticulation; eyes scarcely protruding 

 beyond the line of the jaw; voice a trilling croak 55. 



55. Back almost smooth; rear of thigh typically with small yellow spots on a 



brown background ; Arkansas to Texas 



Hyla versicolor chrysoscelis (Cope) Cope's Tree Toad 

 Back usually with small warts; rear of thigh typically with a brown net' 

 work on a yellow background; Maine to Minn., and southward to 

 Florida and Texas 



Hyla versicolor versicolor (Le Conte) Common Tree Toad, 

 Rain Toad 



56. With a dark band back through the area of the tympanum 57. 

 No such dark band 61. 



57. Back green, with a white border along each side; posterior (concealed) 



surfaces of thighs purplish, spotted with yellow or orange; N. J. to 

 N. C. 



Hyla andersonii Baird Cedar Swamp Tree Frog 

 Back with dark color markings, which may vary or disappear in some 

 specimens; rear of thighs yellowish or brownish, dark dotted or plain 58. 



58. With a more or less definite cross'shaped marking on the back; rear of 



thighs usually dark speckled; not over one and one-half inches long 59. 



Back with changeable dark spots or stripes, which may be absent; rear of 



thighs usually plain yellow; adults larger 60. 



350 



