218 STUDIES IN AUSTRALIAN ENTOMOLOGY, 



form of a short oblique sulcate towards the centre ; labrum black, 

 palpi, manclibulje, and antennae brown ; thighs black, with the 

 tibiee generally brown ; tai'si reddish." 

 " Swan River." 



Promecoderus politus, n.sp. 



^. — Black, very shining, fiist joint of antennae and apex of 

 paljti piceous. Head rather large, convex ; clypeus rugulose, the 

 frontal impressions well marked, extending backwards towards the 

 forehead ; clypeal suture lightly marked ; transverse impression of 

 vei'tex wide, shallow, hardly marked in the middle ; eyes round, 

 rather prominent ; post-ocular prominences moderate, less pro- 

 tuberant than the eyes, and a little more than half their length. 

 Prothorax cordate, about as broad as long (4x4 mm.), lightly 

 convex, a little declivous behind, the basal part being on a lower 

 plane, though not defined by a clearly marked transverse line, 

 truncate in front and behind, lightly rounded on the sides, nar- 

 rowing to the base from a little before the posterior lateral punc- 

 tures ; marginal border narrow, not widened at the anterior angles, 

 gently sinuate on the sides in front of the basal angles, reaching 

 the middle of the base ; the basal angles right angles ; the median 

 line strongly impressed ; under a lens the surface appears covered 

 with very fine transverse scratches. Elytra oval (8x4|mm.), 

 very convex on the sides, but a little flattened along the suture, 

 more pointed at the apex than usual, hardly narrowed to the base, 

 the shoulders rounded ofi", gently declivous to the peduncle ; a 

 single stria on each side of the suture finely but distinctly marked, 

 and reaching the apex (though appearing smooth to the naked 

 eyes, other strise are visible, as fine wavy lines, under a lens). 

 Four last ventral segments of abdomen with deep round fovese 

 on each side. Last joint of tarsi narrowed to the base, and not 

 flattened above. 



Length 14, breadth 4| mm. 



Hah. — Lachlan River, N.S.W. I took two specimens (9) about 

 20 miles west from Condobolin in February 1889. 



