140 NOTES ON AUSTRALIAN COLEOPTERA, 



Head with frontal punctures more distinct than in the former 

 species. Antennal orbits less widely rounded, forehead more 

 convex and rather deeply impressed by a central longitudinal 

 furrow widening anteriorly; antenuse much slenderer, especially 

 as to basal joints, third joint distinctly longer than the fourth 

 and fifth combined. Prothorax wider than long (5x6 mm.), 

 length measured at middle, very convex, anterior angles emar- 

 ginate and acute, directed forwards, apex semicircular, margined 

 only at angles, lateral borders strongly thickened and scarcely 

 recurved, slightly sinuate anteriorly and posteriorly, greatest 

 width about the middle; posterior angles acute and a little over- 

 lapping elytra, base closely titting elytra and feebly bisinuate. 

 Disc not perceptibly punctured, with central channel distinctly 

 impressed throughout (the only case in the four known species; 

 in B. reticulatus this channel is slightly indicated by a smooth 

 line), with two large shallow elliptic impressions near centre, one 

 on each side, and close to, the central line. Scutellum widely 

 transverse and very narrow, elytra triangularly depressed behind. 

 Elytra moderately convex longitudinally, strongly so transversely, 

 sides and apical declivity very steep : at base wider than pro- 

 thorax, humeral angles obtuse but distinct; sides with narrowly 

 reverted border (only apparent at shoulders and apex when seen 

 from above), gradually widening till near apical declivity, then 

 abruptly narrowing, apex rounded and a little horizontally 

 channelled in that region. Each elytron clearly, equidistantly 

 tricostate, first costae not reaching the base, suture itself convex 

 (scarcely costate), space between first costse irregularly impressed 

 with large (and a few smaller) foveate punctures, other costal 

 intervals reticulately, but not rugosely, foveate, with a single 

 row of large punctures on margin extending to apex. Submentum 

 and throat with large aud rather distant, round punctures, pro- 

 sternum smooth with a few transverse stri?e, mesosternum carinate, 

 closely and coarsely punctured, prosternal process bluntly pro- 

 duced backwards and notched on each side. Abdomen minut^ely 

 punctured, with first two segments a little strigose at anterior 

 edges. Femora finely, tibiae (especially towards apex; coarsely 



