278 REVISION OF THE AUSTRALIAN SPECIES OF ADELIUM, 



" third joint of antennae much longer than the fourth and fifth," 

 whereas in A. barbatum it is just equal to those. 



A. barbatum is the same species as that labelled with an MS. 

 name in the Bates Coll. A narrower form, also labelled with an 

 MS. name of Bates', I have from the Dawson River, Queensland. 

 This differs from A. barbatum in its more angulate-sided pro- 

 thorax and less pilose clothing. Having only one imperfect 

 specimen I am unwilling at present to describe it. 



Adelium hackeri, n.sp. 

 ;(Plate iii., fig. 2.) 



Very broad, subovate, moderately convex, dark coppery-bronze, 

 obscurely shining, slightly pilose; antennae and tarsi fuscous- 

 brown, with the usual lighter-coloured tomentum on the under- 

 side of tarsi. 



Head : labrum trapezoidal and prominent, epistoma closely, 

 and front rugosely punctate; at each angle formed by the front 

 with the epistomal ridge is a seta bearing a long hair. Eyes 

 large and widely separate. Antennae stout and short, not 

 reaching the base of prothorax when set back; third joint as long 

 as the fourth, fifth, and half the sixth jointly; joints 3-10 sub- 

 ovate. Prothorax cordate, half as wide again as long, strongly 

 emarginate anteriorly, obtusely pointed anterior angles reaching 

 to the eyes, apex bisinuate, sides widely rounded to the greatest 

 width behind the middle, and crenate on the border (which is 

 raised and thickened near the front angles), then sinuately con- 

 tracting near the base to meet the prominent subrectangular hind 

 angles. Base truncate. Disc densely rugose, with rugosity 

 generally longitudinal, except on the foliaceous margins, where it 

 is transversely striolate. Thinly pilose with short, upright, black 

 hairs. Scutellum large, curvilinear-triangular, with strongly 

 rounded apex, punctate on sides. Elytra truncate-ovate, convex, 

 slightly wider (by measurement, though not visibly) than pro- 

 thorax at its widest; shoulders widely rounded, sides subparallel 

 for half their length, contracting abruptly near the apex. 





