Yucatan .......... Triprion, p. [207].
Ecuador and Mexico .......... Diaglena, p. [207].
b. Tips with very small discs. Tongue free behind.
Tympanum distinct. North America and Peru .......... Chorophilus, p. [208].
Tympanum indistinct. North America .......... Acris gryllus, p. [207].
c. Tips simply swollen, not dilated into discs. Brazil .......... Thoropa miliaris, p. [209].
B. The contracted pupil forms a vertical slit. Tropical America.
a. Tips with large discs.
α. Tongue extensively free behind.
Inner finger and toe opposable .......... Phyllomedusa, p. [203].