390 Mr. F. P. Paseoe on the Brenthidae. 



rounded impression, beyond this it becomes quadrangular, and widens 

 gradually to the apex, with the upper angles serrated, and the space 

 between sprinkled with oblong granules, beneath the rostrum a longi- 

 tudinal costa ; antennae as long as the pro thorax, inserted behind the 

 middle of the rostrum, the four basal joints obconic, the remainder 

 subcylindrical ; prothorax elongate-ovate, nearly as long as the elytra ; 

 elytra short, parallel, with three longitudinal bright-luteous spots on 

 each, the apex entire ; legs rather robust, the anterior largest, femora 

 clavate and toothed beneath, bright-luteous yellow, except at the ex- 

 tremities, tibife short, curved, spined at the apex, the anterior hollowed 

 out internally towards the apex, and clothed with golden-yellow hairs, 

 tarsi rather short, stout ; the last three abdominal segments clothed 

 with golden hairs at the side. Length 10 lines. 



iTHYSTENtrs. 



■ Leptorhynclms, Guerin (1830), non Clift (1829). 



The species of this genus are among the longest and narrowest of 

 the BrentMdce, and have all so much in common, that a minute 

 ^description of each would be little more than a repetition ; at the 

 same time it is only by comparison that they can be, with any 

 degree of certainty, understood. They have all the same dark-brown 

 colour, varied in some by a yellow line on each elytron, and the base 

 of the femora paler than the clavate portion, but this is not always 

 even specifically constant. Individually they vary remarkably in 

 size (6 to 20 lines), and in some instances in the proportional length 

 of their parts. Except the original /. angustatus, none of them have 

 the beautiful fringe of hairs beneath the four posterior tarsi which 

 characterizes that species ; or rather it is so much reduced as to cease 

 to be remarkable. In /. ophiopsis only the prothorax is bent down, 

 almost as if broken. Of the remainder, I. angustatus, I. Wallacei, 

 and /. frontalis have a yellow stripe on each elytron, which does not, 

 however, quite attain to the apex. /. linearis has a red spot at the 

 base of each, while /. fumosus is entirely unicolorous, at least as to 

 the elytra. 



Ithystenus Wallacei. 



I. nigro-fuscus ; capitis fronte Integra, rostro elongate tenui canaliculo ; 



elytris luteo bivittatis, spina exteriore crassa, conica, paulo curvata. 

 Hab. Mysol. 



Differs principally from /. angustatus in the elytra not dilated at 

 the external angle of the apex, but prolonged into a short, thick, 

 conic process slightly curved externally. 



