10 EANIB^. 



Inner metatarsal tubercle compressed ; snout 



pointed 51. arvalis, p. 45. 



b. Tibio-tarsal articulation reaching beyond the tip of the 

 snout. 

 Tympanum not two thirds the width of the 

 eye; first finger not extending beyond 



second ; belly spotted _ 53. iherica, p. 46. 



Tympanum hardly two thirds the width of 



the eye ; belly spotted 54. Intastii, p. 46. 



Tympanum nearly as large as the eye, close 



" to it : belly immaculate 55. agili^, p. 46. 



Snout very long ; no outer metatarsal tu- 

 bercle 57. japomea, p. 47. 



B. Tips of fingers and toes dilated into 



large disks : belly granulate .... 107. huergeri, p. 73. 



II. Ameeican Species. 



A. Tips of toes not dilated. 



1. The web extends to the tip of the fourth toe. 



Tympanum nearly as large as the eye ; 



tibio-tarsal articulation not reaching the 



eye 34. montezumce, p. 35. 



Tympanum as large as or larger than the 



eye ; tibio-tarsal articulation reaching the 



eye 35. cateshiana, p. 36. 



2. Toes at least three-fifths weblied, the web not extending 



to the tip of the fourth toe. 



a. Tympanum as large as or larger than the eye. 



First finger not extending beyond second . . 36. clamata, p. 36. 

 h. Tympanum smaller than the eye. 



a. Vomerine teeth between the choanae. 



Habit stout ; skin porous 37. septentrionalis. 



Head moderate ; tympanum nearly as large [p. 37. 

 as the eye ; glandular lateral fold mode- 

 rate 43. halecina, p. 41. 



Head moderate ; male with external vocal 



sacs 41. ntricidaria, p. 40. 



Head large ; male with external vocal sacs . 42. areolata, p. 41. 



Tympanum nearly as large as the eye ; 



glandular lateral fold very broad 44. palustris, p. 42, 



Tympanum about half the size of the eye . . 45. maeroglossa , p. 42. 



Tympanum nearly as large as the eye ; first 



finger not longer than second 46. maculata, p. 42. 



