25 



a. Outer fingers at least '/ 3 webbed. Vome- 

 rine teeth present. 



a. A dermal ridge along the outer side 



of the fore-arm 8. H. Montana p. 33. 



/3. No dermal ridge along the fore-arm. 

 Skin smooth above. 

 f. Outer fingers about '/ 2 to 3 / 4 



webbed 9. H. riteppclli p. 35. 



ff. Outer fingers nearly half webbed. 10. H. fallax p. 35. 



fff. Outer fingers '/ 3 webbed 38. H angiana p. 59. 



y. No dermal ridge along the fore-arm. 



Upper parts with scattered warts . . 34. H, humcralis p. 56. 



b. Outer fingers at least '/ 3 webbed. No 

 vomerine teeth. 



a. The heel reaches the tympanum. . . 11. H. brachypus p. 37. 

 (2. The heel reaches at least the eye. 

 |. Tympanum about '/ 5 diameter of 



eye. Toes 3 / 4 webbed 12. H. ouwcnsi p. 37. 



\\. Tympanum '/ 4 to '/ 2 diameter of 



eye. Toes about 2 / 3 webbed . . . 13. H. atrofunctata p. 37. 

 Iff- Tympanum not quite '/ 2 diameter 

 of eye. Toes nearly entirely webbed. 



Canthus rostralis distinct 14. H. longlcrtis p. 38. 



fftf. Tympanum '/ 3 to '/ 2 diameter of 

 eye. Toes nearly entirely webbed. 

 Canthus rostralis rounded (10. //. fallax p. 35). 



c. Outer fingers webbed at the base. 



a. Toes narrowly webbed 15. H. albolabris p. 39. 



/3. Toes 2 / 3 webbed. Heel reaching beyond 



tip of snout 16. H. arfahiana p. 39. 



y. Toes 3 / 4 webbed. Heel reaching tip 



of snout 18. H. pratti p. 41. 



S. Toes extensively webbed (the web 

 reaching the disks of third and fifth). 



Heel reaching beyond tip of snout . 19. H. wollastoni p. 42. 

 Tympanum present, its diameter at least 

 about half that of eye. 

 a. No vomerine teeth. Outer fingers '/ 3 to 

 nearly '/ 2 webbed. 



x. Coarsely granular above (13. H. atropunctata p. 37). 



/3. Smooth above. 



-f. Canthus rostralis distinct 20. H. chloronota p. 42. 



f|. Canthus rostralis rounded 10. If. fallax p. 35. 



