496 ENGYSTOMATIDJE. 



toes webbed at the base, the tips not dilated. Outer rnetatarsals 

 united. No prsecoracoids ; sternum a large cartilaginous plate. 

 Diapophyses of sacral vertebra rather strongly dilated. Terminal 

 phalanges simple. 



Burrowing Batrachians, feeding chiefly on ants. 



Synopsis of the Species. 



Suout scarcely longer than diameter of orbit. ... C. systoma, p. 496. 

 Snout nearly twice diameter of orbit C. ylvbulosus, p. 497. 



99. Cacopus systoma. 



I .'ana S3 r stoma, Schneid. Hist, Amph. i, p. 144. 

 tlperodon marmoratum, Ditm. $ Bibr. Erp. Gen. via, p. 749. 

 Cacopus systoma, Giinth. Rept. B. I. p. 415; Buulenr/. Cat. llatr. 

 Sal. p. 174. 



Habit very stout. Head small ; mouth small ; snout rounded, 

 without canthus rostralis, as long as or slightly longer than the 

 diameter of orbit ; iuterorbital space twice or not quite twice the 

 width of the upper eyelid. Fingers moderate, first a little shorter 

 than second ; toes rather short, webbed at the base : subarticular 



Fig. 13(5. Cacopu* tytt<nita, 



tubercles rather indistinct; two strong, compressed, shovel-shaped 

 metatarsal tubercles, inner very large, as long as the second toe. 

 Skin smooth, upper surfaces sometimes tubercular. Olive or 

 pinkish brown above, marbled with blackish brown ; beneath 

 whitish, immaculate. Male with a subgular vocal sac. 



From snout to vent 2 - 5 inches. 



Hcib. India : Carnatic, Biligiriranga Hills, Mysore, Madras. 



According to Thurston, this frog is sometimes found in large 

 numbers at night in Madras compounds during the monsoon, 

 emitting a characteristic sound. It is unfortunate that no 

 observations have been made on the breeding-habits, which cannot 

 but prove of great interest. 



