204 MESSRS. T. BLACKBURN AND P. CAMERON ON THE 



but does not extend behind them. The clypeus is rounded 

 in front. The basal joint of the antennae is extremely 

 compressed, being, on the flat face, scarcely longer than 

 wide, and of subcordiform shape ; the anterior margin of 

 this joint is narrowly testaceous. Near its apex the 

 flagellum is testaceous beneath, while the legs are of an 

 obscure colour except the front tibise, which are testaceous 

 in front. The head does not differ much in shape from 

 that of P. facilis, Sm., nor is the punctuation of the 

 insect much different. The length is about yl millim, 

 I have found this species only on Kauai, and have not 

 seen the female. 



6. Prosopis Kona, sp. nov. 



Niger, flavo-variegatus, haud crebre punctatus ; capite 

 minus elongato, clypeo antice rotundato ; alis hya- 

 linis. 



(^ . Antennarum articulo basali fortiter compresso. 



Long. (J 5 millim., $ 7 millim. 



This is a very distinct species. In the male the face 

 is coloured as in typical P. Blachburni. The anterior 

 margin of the thorax and a spot under the tegulse are 

 yellow; the tibiae are yellow with a black spot on the 

 posterior face of the front pair, and a similar spot on each 

 side of the others ; the first joint of each tarsus is yellow, 

 the remainder are fuscous ; of the antennae the lower sur- 

 face of the flagellum is testaceous, and the basal joint is 

 much compressed (considerably more so than in P. Black- 

 burni), but the dilated face is quite evidently not so wide 

 as long, and its sides are strongly rounded. The hinder 

 portion of the head is closely and very finely punctured ; 

 the surface of the thorax is opaque with excessively minute 

 punctuation, and has also some larger punctures (but even 

 these are fine), the cavities of which, under a strong lens, 



