352 STUDIES IN AUSTRALIAN ENTOMOLOGY, XV., 



of L. quadriseriatus would be next to L. foveigerus Chaud. The 

 described species of Laccoscaphus with four rows of fovese on 

 each elytron and the lateral ocellate pores placed in foveiform 

 depressions are L. foveigerus Chaud., L. quadriseriatus Macl., 

 L. lacunosus MacL, and L. macleayi SI.; these species are all so 

 closely allied to one another that it seems probable they are 

 colour-varieties of one variable and widely distributed species 

 rather than distinct species. L. quadriseriatus differs from all the 

 species mentioned above by the margins of the pronotum and 

 elytra and the bottoms of the elytral foveae being cupreous; size 

 larger; form more convex; pro thorax with anterior angles more 

 obtuse and less prominent, sides more decidedl}^ rounded to 

 anterior angles, base less strongly sinuate on each side — owing to 

 the basal lobe being less developed; elytra more convex, with 

 more numerous fovece in all the rows. L. quadriseriatus is the 

 same size as L. spencei Westw., from which it differ.s by colour, the 

 presence of a juxtasutural row of foveae on the elytra, ifec. A 

 single specimen was sent to me by Herr Sigismund Schenkling, 

 ticketed " New Holland "; I should expect its habitat to be 



tropical Australia. 



Genus C a r e n u m . 



Carenum formosum, n.sp. 

 Elliptical-oval, Isevigate; head convex, frontal sulci parallel, 

 suborbital channel single, lower edge forming a ridge; prothorax 

 convex, transverse, lobate, anterior angles strongly advanced, 

 lateral margins wide, bipunctate; elytra ovate, convex, bipunctate 

 towards apex; anterior tibiae 3-dentate, posterior tibiae slender. 

 Head black with a faint violaceous tinge posteriorly above and 

 below; prothorax widely margined with green (including anterior 

 margin), disc deep purple-black ; elytra violet with green 

 reflections, becoming green near margins; inflexed margin of 

 prothorax and elytra green; prosternum black with episterna 

 viridescent; body black; mes- and metepisterna and ventral 

 segments laterally viridescent; legs, antennae and palpi black, 

 antenn£e on sides of apical joints and apex of palpi reddish- 

 piceous. 



