Mr. F. Walker on some undescribed Ceylon Insects, 217 



a species of Iguana. An example seen by one of us was about 

 4 feet long, with a large dewlap and high dorsal crest extending 

 down the back. It appears now to be restricted only to the 

 eastern end of the island/' 



Mr. Riise, of St. Thomas, has sent, during the printing of 

 this paper, two bottles containing frogs from that island. One is 

 marked Hylodes martinicensis, the other, Cystignathus ocellatus. 

 After a careful examination and comparison with the other 

 species of Hylodes and Cystignathus, I have convinced myself 

 that both belong to one and the same species, and that those 

 named C. ocellatus are merely the young of the other. The 

 toes are not at all dilated; and the frogs belong to a new 

 species of Cystignathus, which I call 



Cystignathus alMlabris, 



Tympanum distinct, one-half the size of the eye. Vomerine 

 teeth in two short series, behind the level of the interior nostrils. 

 Tongue very slightly nicked posteriorly. Skin smooth, with an 

 indistinct longitudinal fold on each side ; a transverse fold be- 

 tween the fore-legs, another across the posterior third of the 

 belly. Snout moderately produced. Tarsus with a longitu- 

 dinal fold ; interarticular tubercles prominent. Male with two 

 vocal sacs, communicating with each other, each with a separate 

 slit. A white or whitish streak round the snout to the axil. 



Colour of the adult : — Above uniform dark bluish-black ; the 

 upper leg with some black cross-bars superiorly, and some 

 whitish spots posteriorly. The lower parts white, the throat 

 speckled with brown. The labial streak whitish, indistinct 

 below the eye. 



Colour of the young : — Brownish-olive marbled with darker ; 

 uniform white inferiorly ; the labial streak white, very distinct. 



These descriptions of the colours are taken from quite fresh 

 specimens in spirits. 



Hab, St. Thomas. The specimens are now in the British 

 Museum. 



XXIII. — Characters of some apparently undescribed Ceylon 

 Insects. By F. Walker. 



[Continued from vol. iii. p. 266.] 



Fam. Curculionidae, 



Desmidophorus discriminans. Ferrugineus, crassus, rostro ro- 

 busto nigro iiitente striate coxas aiiticas attingente, thorace tuber- 

 culato, elytris rude lineato-tuberculatis, vix dimidio apicali testaceo- 

 albido, femoribus albido fasciatis. Long. 5 lin. 



