80 



O. impennis, Fauvel, I., p. 30, 1877. 



Male, pitch bronze, sMning, thorax paler colour, elytra and 

 feet a dirty testaceous pitch ; very easily distinguishable from 

 all other species by having short elytra, and eyes much smaller 

 than usual ; the antennae slightly thickened, 0-8 joints small, 

 strongly transverse, 9-11 not so short and broader ; the head 

 large, transverse, dilated behind the eyes, above them finely 

 punctate, on each side close to the eyes a narrow impression ; 

 forehead concave, produced anteriorly, truncated, rising in 

 front of the clypeum, smooth ; the top sloping downwards, not 

 corrugated ; thorax one-third as broad again as it is long, sub- 

 trapezoid, slightly narrower than the head, about the base 

 rather markedly narrow, the anterior extremities rectangular, 

 the posterior being rounded ; on the dorsal region are three 

 furrows, these, especially the outer ones, being subobsolete ; 

 the disc is finely and rather densely punctate, a little more 

 rugose than the sides, which are marginate, and slightly 

 impressed ; the elytra are of same breadth as the head, one- 

 third broader than they are long, deeply but sparsely punctate 

 and rugose ; abdomen very smooth ; in the male the bottom of 

 the sixth segment in front of the apex has a transverse impres- 

 sion ; the seventh has the apex deeply divided into two lobes, 

 the middle of the lobe being somewhat triangularly extended. 

 The female is smaller with smaller head, narrower than the 

 breast, which is longer. Length — 3i mill. 



Localities. — Adelaide, Victoria. 



O. subaeneus, Fauvel, I., p. 31. 

 Male, in size and shape something like complanatus, but more 

 rounded and in other respects totally distinct; bronze black, 

 moderately shining, with a dark brown antenniform tubcrculum 

 on the forehead ; the thorax and elytra also dark brown, the 

 feet being paler ; antennae slightly thickened, the 4-6 joints 

 monilif orm, the 7-10 rather transverse ; head convex, a little 

 transverse, suborbiculate, with somewhat fine punctures pretty 

 thickly scattered over it, the forehead smooth, lightly indented 

 on either side, a little raised in front of the clypeum, anteriorly 

 prolonged and subtruncated ; thorax same breadth as head, but 

 flatter, a third as broad again as it is long, rather sinuous 

 about the base and very narrow with deep punctation equally 

 meagre and rugose, the anterior extremities salient, subacute, 

 the posterior ones obtuse, the back obsoletely trisulcate, the 

 sides margined with deeper impressions ; the elytra a little 

 broader than the head, slightly oblique, very thickly and deeply 

 Tugose-punctate, rather depressed between the shoulders ; 

 abdomen less shiny, alutaceous, sparsely and very finely 

 punctate ; the middle of the sixth segment emarginate below 



