556 NEW SPECIES OF AUSTRALIAN COLEOPTERA, 



since examined the type of that species and find that the two are 

 abundantly distinct in other particulars besides colour and size. 



MALACODERMID^. 



M E T R I O R R H Y N C H U S. 



A number of genera have been proposed at the expense of this 

 genus. Mr. Blackburn* considers that Xmitheros is synonymous 

 with Trichalus, and with this, I think, most will agree He also 

 considers that Trichnlus cannot be maintained as distinct from 

 Metriorrhynchus.j I myself do not think it can, but the species 

 ma}' be easily recognised on account of the trifurcate costa next 

 the suture. Mr. Waterhouse remarks :| " The following descrip- 

 tions will, I think, be sufficient to show that the length of the 

 rostrum in these insects is not of generic importance, and that 

 therefore the gen\ifiJfetriorrhi/nchus,(Gu.evm, 1838), cannot stand." 

 He therefore refers all the species, except those included in his^ 

 new genus Trichalus, to Porrostoma, (Castelnau, 1836). Sub- 

 sequently§ he states that for the sake of convenience both names 

 should be i-etained, and proposes the following new genera — 

 Bulenides, Xylohanus, Synchonnus, Sfadenus, Achras and Clado- 

 phorus. I do not think that any of these names should l:>e 

 recognised, the characters on which they are founded appearing to 

 be of specific value only. Porrostoma appears to have priority, 

 but as Metriorrhynchus is in general use I shall use that name 

 for the following species. 



Metriorrhynchus marginipennis, n.sp. 



$. Black, sides and apex of prothorax, sides, suture and apical , 

 fifth of elytra yellowish. Very feebly pubescent. 



* Trans. Roy. Soc. S.A., 1894, p. 208. 



t If Trichalus is to be sunk, it will be necessary to change the name of 



M. se.rratkornU, Macleay, that name liaving been previously used by 



Fabricius. 



X Trans. Ent. Soc. 1877, p. 73. 



§ Illustrations of Typ. Col. in the Brit. Mus. 



