124 Records of the Indian Museum. [Vol. XX, 



Vomerine teeth in oblique groups just behind level of 

 choanae ; head as long as broad ; snout longer than 

 eye ; loreal region moderately oblique ; tympanum 

 nearly as large as eye ; tibio-tarsal articulation reach- 

 ing beyond tip of snout ; male with internal vocal 

 sacs and a cubital gland ... ... .. R. ciibitalis, M.Smith. 



b. Toes \ to f webbed ; tibia i| toa litUe less than 2 times in length from 



snout to vent ; tympanum '\ to f diameter of eye ; vomerine teeth 

 in oblique groups or series between the choanae : dorso-lateral fold 

 moderate or rather broad. 

 Loreal region moderately oblique ; interorbital region 



a little narrower than the upper eyelid ; tibia 3 to 4 



times as long as broad ; male with internal vocal 



sacs and a verj' large gland on each side above and 



behind the shoulder ... ... ... R. adenopleiiro, Blgr. 



Loreal region feebly oblique or nearly vertical ; inter- 

 orbital region as broad as or a little broader than the 



upper eyelid ; tibia 4 to 4^ times as long as broad ; 



male with external vocal sacs ... ... R. gracilis, Gravh. 



c. Toes nearly entirely webbed ; tibia i^ times 



in length from snout to vent ; loreal region 

 vertical ; tympanum | diameter of eye ; 

 « vomerine teeth in oblique groups between 



and extending a little beyond the choa- 

 nae; dorso-lateral fold narrow ... R. elbtrti, Roux. 

 2. Fingers with the tips swollen into small discs ; loreal region feeblj' oblique 

 or nearly vertical ; tympanum 4 to nearly once diameter of eye. 

 Tibio-tarsal articulation reaching tip of snout or a little 

 beyond ; tibia 4I to 5I times as long as broad ; toes f 

 webbed ; first finger not longer than second ; vomerine 

 teeth extending considerably beyond level of posterior 

 borders of choanae; dorso-lateral fold very narrow... R. santeri, Blgr. 

 Tibio-larsal articulation reaching eye or nostril ; tibia 

 3I to 4 times as long as broad ; toes webbed to the 

 discs of the third and fifth ; first finger a little longer 

 than second; vomerine teeth between or just behind 

 posterior borders of choanae ; dorso-lateral fold rather 

 broad; male with internal vocal sacs and a humeral 

 gland... ... ... ... ... R. nigrovittata, Blyth. 



Tibio-tarsal articulation reaching eye or between eye 

 and nostril ; tibia 4 to 4| times as long as broad ; toes 

 \ to f webbed ; first finger much lonf;er than second ; 

 vomerine teeth between the choanae, or extending a 

 little beyond ; dorso-lateral fold broad ; male with ex- 

 ternal vocal sacs and a humeral gland ... ... R. leptoglossa, Cope. 



n. Discs of fingers bearing a groove separating the upper from the lower surface. 

 A. Tips of fingers and toes dilated into small discs which are not twice as 

 broad as the narrowest part of the corresponding penultimate phalanx. 

 I. .\ glandular dorso-lateral fold. 

 a Vomerine teeth in strong oblique series nearly touching anterior cor- 

 ners of choanae; first finger longer than second ; tibia 4 to 4J times 

 as long as broad ; no outer metatarsal tubercle ; tympanum | to f 

 diameter of. eye ; male with external vocal sacs and a humeral gland. 

 Head as long as broad ; loreal region moderately ob- 

 lique ; interorbital region as broad as upper eyelid ; 

 tibio-tarsal articulation reaching nostril ; tibia shorter 

 than foot ; toes nearly entirely webbed ... ... R.hnmeralis. Blgr. 



Head as long as broad; loreal region more oblique; 

 interorbital region narrower than upper eyelid ; tibio- 

 tarsal articulation reaching eye ; tibia longer than 

 foot; toes I webbed ... ... ... R. miopiis, Blgr, 



Head longer than broad ; loreal region feebly oblique ; 

 interorbital region as broad as upper eyelid ; tibio- 

 tarsal articulation reaching between eye and tip of 



