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



snout; tibia as long as fool; toes nearly entirely 



webbed ... ... ■• •■ R.oatesii, Blgr. 



b. Vomerine teeth in short groups or series remote trom the anterior cor- 

 ners of the choanae. 



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

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

 diameter of eye. 

 Tibio-tarsal articulation reaching eye or tip of snout ; 

 tibia 4 to 4^ 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^ to 5I times as long as broad ; toes A 

 webbed ; dorso-lateral fold narrow ; male without 

 vocal sacs or humeral gland... ... ... R. macrodacfyla, Gthv. 



Tibio-tarsal articulation reaching between eye and tip 

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

 webbed ; dorso-lateral fold narrow ... ... R. aurajitiaca, B\gr. 



Tibio-tarsal articulation reaching far beyond tip of 



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



/3. Tibia usually longer than foot, never shorter ; first finger longer than 

 second ; tvmpanum f 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 litde beyond ; tibia 4 to 4i 

 times as long as broad ; discs of third and fourth 

 fingers not more than \ diameter of tympanum ; toes 

 I webbed ... ... ... ... R. temporalis, Gthr. 



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

 vomerine teeth not extending beyond level of posterior 

 borders of choanae ; tibio-tarsal articulation reaching 

 tip of snout ; tibia 5 to 5^ times as long as broad ; 

 discs of third and fourth fingers f to | diameter of 

 tympanum ; toes I webbed ... ... ... R.forensis,B\gr. 



Head longer than broad ; tibio-tarsal articulation reach- 

 ing nostril or tip of snout ; tibia 5 to 5| times as long 

 as broad ; discs of third and fourth fingers | to f 

 diameter of eye ; toes J to f webbed ... ... R. tiicobariensis, 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 f 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 



i| to if times in length from snout to vent ... R. aiticola, Blgr. 



***Dorso-lateral fold broad ; head longer 

 than broad ; tibio-tarsal articulation 

 reaching nostril ... ... R. celebensis, Peters. 



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

 diameter of eye ; dorso-lateral fold narrow. 

 First finger as long as second ; discs of fingers smaller 



than those of the toes ... ... ... R. gayoensis,B\gv. 



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. Jiaaica, Blgr. 



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 ; 



