326 MISCELLANEA EXTOMOLOGIOA, 



the margins, in having the rows of foveae more distinctly separa- 

 ted by raised interstices, and by having a fiery green reflection 

 at the bottom of each fovea. 



Carendm Digglesii, 

 Long. 7^ hn. 



^Nigrum subopacum, thorace subtransverso antice truncato 

 postice lobato anguhs posticis rotundatis subemarginatis, 

 elytris ovatis antice emarginatiS obsolete punctatis sub- 

 costatis triseriatim foveatis foveis magnis hand profundis, 

 tibiis anticis extus tridentatis. 

 This species differs from G. Spencei and all the others of that 

 group, in the sculpture of the elytra, which present three broad 

 though faint costce on each, with rows of almost obliterated punc- 

 tures, and three rows of distant shallow foveee, five or six in each 

 row. The thorax also differs from that of G. Spencei, in having 

 the posterior lobe more truncate, and the posterior angles more 

 emarginate. 



The only specimen of this insect I know belongs to Mr. 

 Diggles of Brisbane, and was taken on a piece of timber floating 

 down the Brisbane River during a flood. 



Carenum planipenne. 

 Long. 11 lin. 



Nigrum nitidum, thorace transverso viridi-marginato later- 



aliter rotundato postice lobato emaT'ginato angulis posticis 



emarginatis, elyiris nitidissimis purpurascentibus viridi- 



marginatis ovatis subplanis postice bipunctatis, tibiis 



anticis extus bidentatis. 



This is a South Australian species, and is found I believe at 



Port Wakefield. It is a broad, flat, beautiful insect, of the G. 



marginatum group, but difiering in form and appearance very 



much from that insect. 



Carenidium lacustee. 

 Long. 13 lin. 

 Nigrum nitidum cyaneo-marginatum, thorace subquadrato sub- 



depresso postice angustato truncato, elytris elongato-ovatis 



punctis sublatei-alibus. 



