8 Records of the Indian Museum. [Voi,. XX, 



toes entirely or nearly entirely webbed ; breeding male with much thickened 

 fore limb and horny spinules on the inner fingers and on the breast. 



a. Tympanum distinct; a tarsal fold; male with internal vocal sacs. 



a. Tibio-tarsal articulation reaching eye ; tibia 2f to 3^ times as long as 

 broad, twice in length from snout to vent. 

 First finger longer than second ; tips of toes not swollen ; 



inner metatarsal tubercle f length of inner toe ... R.feae, Blgr. 

 First and second fingers equal ; tips of toes slightly 

 dilated; inner metatarsal tubercle compressed, sharp- 

 edged ... ... ... ... R. yuiinaneiisis, And. 



First finger slightly longer than second ; tips of toes 

 swollen ; inner metatarsal tubercle 4 length of inner 

 ■ toe . ... ... ... ... A*, tibetana, Blgr. 



j8. Tibio-tarsal articulation reaching temple or 

 posterior border of eye ; tibia 3 to 3^ times 

 as long as broad, 2\ to 2\ times in length 

 from snout to vent ; first finger as long as 

 or a little shorter than second ; tips of toes 

 obtuse or slightly swollen ; inner metatarsal 

 tubercle f to I length of inner toe ... R. sternosignata,M.UTr. 



b. Tympanum hidden or very indistinct ; first finger longer than second. 

 Tibio-tarsal articulation reaching shoulder or tympa- 

 num ; tibia 2\ times as long as broad, 2\ to 2| times 



in length from snout to vent • heels not overlapping ; 

 tips of toes not swollen ; inner metatarsal tubercle }, 



length of inner toe ; male with internal vocal sacs ... R. phrynoides, Blgr. 

 Tibio-tarsal articulation reaching eye , .tibia 2\ to 3^ 

 times as long as broad, about twice in length from 

 snout to vent ; heels overlapping ; tips of toes swollen ; 

 inner metatarsal tubercle \ length of inner toe ; male 

 with internal vocal sacs ... ... ... R. spinosa, David. 



Tibio-tarsal articulation reaching eye ; tibia if to 

 nearly 2 times in length from snout to vent ; heels 

 overlapping ; tips of toes swollen ; inner metatarsal 

 tubercle ^ length of inner toe ; male without vocal 

 sacs ... ... ... .. ... R. gammiei, And. 



II. Tibio-tarsal articulation reaching nostril, tip of snout, or beyond ; heels 

 overlapping; tibia 3 to 4 times as long as broad, if to 2 times in length 

 from snout to vent ; first finger as long as or a little shorter than second ; 

 tips of toes swollen. 



a. Male with much thickened fore limb, with horny spinules on the inner 



finger and on the breast. 



Head a little broader than long : tympanum feebly dis- 

 tinct ; toes f webbed ; dorso-lateral fold distinct only 

 in front ; male without vocal sacs .,, ... R. annandalii, Blgr. 



Head much broader than long ; tympanum hidden or 

 very indistinct ; toes entirely webbed ; a dorso-lateral 

 fold usually distinct ; male with internal vocal sacs ... R. liebigii, Gthr. 



b. Male with fore limb not much thickened, without spinules, without vocal 



sacs ; head a little broader than long. 

 Tympanum distinct ; toes entirely webbed ; a feeble 



dorso-lateral fold ... ... ... R. assatnensis, W. Scl. 



Tympanum hidden ; toes entirely webbed ; no dorso- 

 lateral fold ... ... ... .. R. vicina, Stol. 



Tympanum very indistinct ; toes § to f webbed ; no 



dorso-lateral fold ... ... ... R. blanfordii, Blgr. 



H. A glandular dorso-lateral fold,' connected with the supratemporal fold ; 

 tympanum very distinct, smooth. 

 A. Omosternal style not forked at the base. 



I. Outer metatarsals separated nearly to the base. 



a Canthus rostralis very obtuse or indistinct ; interorbital space much 



' Absent or indistinct in some specimens of R. gi-ahami and /?. malabarica. 



