METRIOKRHTNCHUS. 47 



bases. Thorax a little narrowed and rounded in front ; the sides a 

 little sinuous ; the dorsal ridges well marked, dividing the surface 

 into seven areolets. Elytra parallel, very long, tipped with black, 

 quadricostate ; the interstices with two rows of transverse fovese, 

 the rows divided by a fine carina. The apical half of the posterior 

 tibiae, the tarsi, and abdomen black. 



The example from Port Essington has the posterior tibice entirely 

 yellowish red. 



METRIORRHYNCHUS. 



Guerm-Menev., Voy. d. I, Coqidlle, 1838, Ento^n. p. 72. 



This genus only differs from Porrostoma in having a short rostrum ; 

 it is, however, convenient to adopt it. 



The type of the genus is parallelus, Guerin, from New Guinea. 



]y[etriorrh3riichus fuscolineatus. 



(Plate XII. fig. 4.) 



Porrostoma liueatum, Waterh., Trans. Ent. Soc, 1877, p. 78, pi. i. 

 figs. 45-48. 



Fusco-niger ; thoracis limbo elytrisque obscure flavis, his qua- 

 dricostatis, interstitiis infuscatis, biseriatim foveatis ; rostro latitudine 

 breviore. $ . Long. 6 lin. 



Hab. N.W. Australia and Hobart Town. 



Thorax blackish, with the lateral and anterior margins yellowish. 

 Elytra yellowish, with the interstices dusky and with a double series 

 of square punctures, the rows are not distinctly divided by a ridge. 



Since this species was originally described I have found that 

 Omalysus lineatus, Hope, then unknown to me, belongs to this genus, 

 so that the name lineatum has to be changed. 



Metriorrhynchus togatiis. 



(Plate XII. fig. 2.) 



Porrostoma togatum, Waterh., Trans. Ent. Soc, 1878, p. 78, pi. i. 

 figs. 49-52. 



Niger ; elytris elongatis, flavo-rufis, apice nigro, quadricostatis, 

 interstitiis biseriatim punctatis ; rostro latitudine paulo breviore, 

 medio canaliculate, utrinque fovea magna nitida. S • Long. 5 lin. 



Hab. N.W. Australia. 



The rostrum is scarcely as long as broad, narrowed towards the 

 apex, very thickly and extremely finely punctured. The elytra are 

 dull yellowish red, with the apex black, the black more advanced 

 on the suture than at the sides ; each elytron has four cost* ; the 

 interstices with two rows of square pmictures, the rows not dis- 

 tinctly divided by a costa. 



