284 REVISION OF THE AUSTRALIAN SPECIES OF ADELIUM, 



Adelium rotundum, n.sp. 

 (Plate iii., fig.7.) 



Shortly ovate, dark bronze, sometimes greenish, shining, very- 

 convex. Tarsi, palpi and antennae brown. 



Head : front rugosely punctate; epistomal ridge prominent and 

 strongly punctate, punctures large; labrum salient. Eyes large, 

 prominent and coarsely faceted. Antennae moderately stout and 

 long and both they and the palpi pilose, third joint less than 

 fourth and fifth combined. Prothorax convex, width twice the 

 length, greatest width near base, much narrower in front; trun- 

 cate at base and apex. Front angles widely obtuse and scarcely 

 produced forward; sides strongly rounded and widened towards 

 base, meeting the base in a circular curve without any indication 

 of hind angles. Disc coarsely punctured, punctures large and 

 separate. Two shallow impressed foveae near base (in female 

 only). Without distinct foliaceous margins, though their position 

 is indicated by a more or less distinct ridge and sulcus, the sulcus 

 never extending beyond half-way from the front. Scutellum 

 triangular, with rounded apex, punctate. Elytra strongly convex 

 and oval. In the male the width is about the same as the base 

 of prothorax, in the female width is greater than that of pro- 

 thorax. Disc with about ten striae on each elytron; these closely 

 punctate. Intervals scarcely raised and minutely punctate. 

 Shoulders widely rounded; sides, in female, gently rounded, in 

 male subparallel to near apex, then narrowing to a blunt apical 

 point. Epipleurae, femora and apical segment of abdomen finely 

 punctate. Beneath a shining blue-black. Dimensions — $ 10 x 

 4*5 mm.; £ 12 x 6 mm. 



Loc. — Monaro, N. S.W. (near Jindabyne; collected by author). 



This species is the most convex Adelium known to me, and 

 can be readily recognised by this feature alone, combined with 

 its peculiar prothorax. There is more than the usual sexual 

 difference indicated by size, especially the width of female 

 specimens. 



