Australian and Tasmanian Malacodermidae. 77 



basal angles acute and laterally produced. Scutellum shining, 

 depressed, almost parallel-sided to apex, which is semicircularly 

 emarginate. Elytra narrow, parallel-sided ; each quadricostate, 

 the interspaces with single rows of large rectangular punctures, 

 separated by distinct ridges. Abdomen with the penultimate seg- 

 ment widely and subtriangularly excised. 

 Length 6 mm. 



J£ab. W. Australia : Mount Barker, 



In size, colour and general appearance strongly resembles 

 meyricki (also from Western Australia, and with the elytral 

 punctures in single series), but at once distinguished by 

 the prothorax being distinctly divided into three areolets 

 instead of into seven. The elytral punctures are usually 

 transverse but are sometimes distinctly longer than wide, 

 those of the two sutural rows are, as a rule, larger than the 

 others. The median areolet of the prothorax is narrowly 

 open posteriorly and terminates about one-third from the 

 apex, with which it is connected by a narrow shining 

 carina. 



Metriorrhynchus obscuripennis, n. sp. 



^ . Black ; elytra dark reddish-brown, the sides and suture some- 

 what paler. 



Rontrum very short. Antennae passing middle of elytra ; 2nd 

 joint moderately distinct, 3rd no longer than 4tli, its ramus (as also 

 that of 10th) slightly shorter than the joint itself, of the others 

 mostly longer than the supporting joint. Prothorax moderately 

 transverse ; 5-areolate, the costae connecting the median areolet with 

 the sides rather indistinct ; anterior angles rounded, apex slightly 

 produced and notched in middle, sides constricted in middle but 

 basal fourth almost parallel-sided, posterior angles subacute but not 

 laterally produced. Scutellum diminishing in width to apex, which 

 is rather deeply emarginate. Elytra narrow, parallel sided ; each 

 quadricostate, the interspaces with double rows of large irregular 

 punctures, the transverse and longitudinal ridges separating the 

 punctures often indistinct. Abdomen with the penultimate segment 

 triangularly excised. 



Length 13 mm. 



Hah. Tasmania : Hobart. 



In appearance somewhat like various forms of Triclialits 

 discoideus, but the prothorax 5-areolate, sutural costa not 



