1920.] G. A. BouLENGER : Frogs of (lie Genus Rana. 125 



snout ; tibia as long as foot ; toes nearl\- entirely 



webbed ... ... ... ..Ji R.oatesii, Blgr./ ' 



b. X'omerine teeth in short groups or series remote from the anterior cor- 

 ners of the choanae. 



o. Tibia as long as or shorter than foot ; first finger as long as or a little 

 longer than second ; head longer than broad ; tympanum | to once 

 diameter of eye. 

 Tibio-tarsal articulation reaching eye or tip of snout ; 

 tibia 4 to 45 times as long as broad ; toes | to nearly 

 entirely webbed ; dorso-lateral fold broad ; male with 



internal vocal sacs and no humeral gland ...'''R. crythraea, Schleg. 



Tibio-tarsal articulation reaching tip of snout or be- 

 yond ; tibia 4.J to 55 times as long as broad ; toes J 

 webbed : dorso-lateral fold narrow ; male without 

 vocal sacs or humeral gland ... ..j:R. macrodnclyla, Gthr. 



Tibio-tarsal articulation reaching between eye and tip 

 of snout ; tibia 6 times as long as broad ; toes \ 

 webbed; dorso-lateral fold narrow ... ...'!' R.aurantiaca, Blgr. 



Tibio-tarsal articulation reaching far beyond tip of 



.snout; toes f webbed; dorso-lateral fold narrow ... ( R. sanguinea, Boettg. 



j8. Tibiausually longer than foot, never shorter ; first finger longer than 

 second ; tympanum ? to once diameter of eye. 

 •Dorso-lateral fold narrow or moderately broad ; male with internal 

 vocal sacs and a humeral gland. 

 Head as long as broad or a little longer than broad ; 

 vomerine teeth extending beyond level of posterior 

 borders of choanae ; tibio-tarsal articulation reaching 

 nostril, tip of snout, or a little beyond ; tibia 4 to \h 

 •^Imes as long as broad ; discs of third and fourth 

 'ers not more than J diameter of tympanum ; toes 

 ' "^ed ... ... ... ...'■ R. temporalis, Gthr. 



"> long as broad or a little longer than broad ; 



:2 teeth not extending beyond level of posterior 



I ibio-tarsa ^f choanae ; tibio-tarsal articulation reaching 



toesentiri,Qy|. . ^\]^\^ j to 5^ times as long as broad ; 



ly longer third and fourth fingers 4 to i diameter of 



without ,-ium . toes 1 ^^,gbbed ... '... ../ R. Jlorensis, mgv. 



1 ibio-tar.^ng.g^ than broad ; tibio-tarsal articulation reach- 

 quite ,'ostril or tip of snout ; tibia 5 to 5i times as long 

 "'scsjroad ; discs of third and fourth fingers ^ to f 

 fyrTameter of eye ; toes 5 to f webbed ... R. nicobariensis, Stol. 



**Dorso-lateral fold narrow ; head longer than broad ; tibio-tarsal 

 articulation reaching tip of snout or beyond ; tibia 5 to 6 times 

 as long as broad ; toes J webbed ; male with internal vocal sacs 

 and no humeral gland. 

 Loreal region nearly vertical, deeply concave; tibia li 



to if times in length from snout to vent ... R. varians, B\gr. 



Loreal region feebly oblique, moderately concave ; tibia 



l| to if times in length from snout to vent ... R. alticola, Blgr. 



***Dorso-lateral fold broad ; head longer 

 than broad ; tibio-tarsal articulation 

 reaching nostril ... ...'' R. ceUbensis, Peters. 



7. Tibia longer than foot, 4 to 5 times as long as broad ; tympanum i 

 diameter of eye ; dorso-lateral fold narrow. 

 First finger as long as second ; discs of fingers smaller 



than those of the toes ... ... ... R.garoensis, Blgr. 



First finger longer than second ; discs of fingers as large 

 as those of the toes ; male with external vocal sacs 

 and no humeral gland ... ... ... 'R. iiasica, h\gT. , 



2. Glandular dorso-lateral fold absent or represented by a chain of large 

 warts. 

 a. Toes entirely webbed ; outer metatarsal tubercle absent or very indis- 

 tinct, 

 a. First finger much longer than second ; 



