78 Mr. Arthur M. Lea's Revision of the 



trifurcate at base, etc. It would probably have been 

 referred to Stadenus by Mr. Waterhouse ; from his in- 

 quioiulus it differs in the colour of the elytra, the pro- 

 thorax more transverse and angular and notched in the 

 middle of the apex ; elytral punctures less regular, etc. 



Metriorrhynchus triareolatus, n, sp. {Figs. 84, 162, 

 163.) 



(J . Black ; elytra partly reddish-testaceous. 



Head shining. Eostrum almost absent. Antennae strongly serrate ; 

 end joint moderately distinct, 3rd slightly longer than 4th. Protharax 

 moderately tranverse, apex feebly emarginate in middle, sides feebly 

 constricted in middle, all the angles strongly rounded ; 3-areolate, 

 the middle areolet continuous from base almost to apex. Scutellum 

 larger than usual, apex semicircular. Elytra feebly increasing in 

 width to ajiex ; quadricostate, the interstices with double rows of 

 subquadrate punctures, the ridges separating the punctures rather 

 feebly elevated. Abdomen with penultimate segment narrowly and 

 deeply excised. 



Length 8J mm, 



9 . Differs in being larger, elytra less parallel, abdomen simple, etc. 



Hob. W. Australia : Vasse {A. M. Lea) ; King George's 

 Sound (Australian Museum). 



Although the antennae in all the specimens before me 

 are damaged (in one male only five joints are left, in 

 another male and in a female only one joint of each is 

 left), I have described this species on account of its strong 

 resemblance to meyricki and constricticollis (both from W. 

 Australia) which yet are so differently sculptured as to 

 render them easily separable, Nigrovittatus (from New 

 South Wales) is very similarly coloured and also has the 

 prothorax triareolate but the posterior angles are very 

 decidedly acute ; in the present species also the elytra 

 are glabrous, shining, and with the costae rather widely 

 separated, whilst in that species the elytra are pubescent, 

 opaque, and with the costae much closer together. The 

 black portion of the elytra is moderately wider at the base, 

 is narrowed at the basal third and then dilates so as to 

 cover the whole of the apical fourth. 



Metriorrhynchus nigrovittatus, n. sp. {Fig. 161.) 



$ . Black ; elytra testaceous but with a broad black sutural stripe ; 

 which widens posteriorly. 



