594 REVISION OF THE AUSTRALIAN CURCULIONID.E, X., 



and as decidedly cavernous in others. lu Deretiosus the pectoral 

 canal is open at the apex, and terminates suddenly beyoud the 

 intermediate coxse; but between these there is absolutely no part 

 of the mesosternum that can come in contact with the sides of 

 the rostrum or impinge on the coxae. All the genera (with the 

 exception of Tituacia) are winged. 



The species (with veiy few exceptions) are either more or less 

 cylindrical, or flat with an elliptic or elongate-elliptic outline. 

 The majority are clothed with large soft scales, with larger and 

 semierect ones (sometimes setose in character) intermingled: 

 many of them have fascicles; on the prothorax, six in number; 

 two at apex and four across middle; on the elytra they are less 

 uniform. 



The great majority of the species occur in heavy forest country, 

 being very numerous in Queensland and the northern coastal 

 rivers of New South Wales; many occur in Tasmania, the genus 

 Pseudometyrus being almost confined to it. The bulk of the 

 genera and species, however, are inhabitants of the Malay Archi- 

 pelago and New Guinea. 



A. Mesosternal receptacle absent Deretiosus. 



AA. Mesosternal receptacle open. 



a. Metasternum very short, eyes coarsely faceted .. Tituacia. 



aa. Metasternum normal, eyes finely faceted. 



b. Tibije with terminal hook and subapical tooth Euthyerhinus. 



bb. Tibiae with terminal hook only. 



0. Rostrum longer than prothorax Isax. 



cc. Rostrum no longer than prothorax. 



(/. Eyes subtriangular Chimades. 



del. Eyes round. 



e. Femora strongly dentate Phl.eogltmaia. 



ee. Femora edentate, or only the middle pair 



dentate Ephrycus. 



AAA, Mesosternal receptacle cavernous. 

 B. Eyes finely faceted. 



/, Claw-joint short Metacymia. 



f. Claw-joint long. 



g. Front femora (at least) edentate. 



A. Scrobes visible from above Wiburdia. 



hh. Scrobes not visible from above Ephrycinus. 



