i6 5 



1. Toes 2 / 3 webbed IO. R. palavancnsis p. 182. 



2. Toes entirely or nearly entirely webbed. . (5. R. macrodon p. 174). 

 II. Dilatations of fingers and toes with a groove 



between upper and lower surface. Toes x \ 2 to 

 3 / 4 webbed. 



1. A light line along canthus rostralis and 

 border of upper eyelid. Disks small. Toes 



2 <3 or 3 U webbed 46. R. signata p. 226. 



2. No such line. 



a. Disks small. Toes x \ 2 to 2 / 3 webbed. 



x. Interorbital space narrower than the 



upper eyelid 44. R. persimilis p. 223. 



(3. Interorbital space at least as broad as 



the upper eyelid 45. R. ?iicobariensis p. 224. 



b. Disks small. Toes 3 / 4 (or entirely) webbed. (43. R. erythraea p. 222). 



c. Disks of outer fingers large. Toes 3 / 4 (to 



entirely) webbed (42. R. labialis p. 220). 



III. Dilatations of toes, and usually also of fingers, 

 with a groove between upper and lower sur- 

 face. Toes entirely or nearly entirely webbed. 

 1. First finger extending beyond second. 



a. Dorsolateral fold narrow. 



x. Sides of head not darker than the upper 



surface 27. R. arfaki p. 199. 



(3. Loreal and temporal region entirely or 

 partly black or brown, 

 f. Tips of fingers feebly dilated, devoid 



of groove 28. R. elberti p. 200. 



ff. Tips of fingers with small disks, 



bearing a groove 29. R. papua p. 201. 



b. Dorsolateral fold broader. Heel not reach- 

 ing beyond the nostril. 



x. Tibia more than x j 2 length of head 



and body 30. R. celebcnsis p. 204. 



f3. Tibia '/ 2 length of head and body or less. 



f. Vocal sacs of male internal .... 31. A 5 , daemeli p. 205. 



\\. Vocal sacs of male external .... 32. R. kreffti p. 206. 



c. Dorsolateral fold broader. Heel reaching 

 beyond tip of snout. 



x. Interorbital space narrower than the 



upper eyelid. Male with large external 



vocal sacs 33. R. grisea p. 207. 



/3. Interorbital space about as broad as 



