I 



846 AUSTRALIAN COLEOPTERA, WITH DESCRIPTIONS OF NEW SPECIES, 



four teeth well de6ned though blunt, and above them the external 

 •edge is cut on one tibia into two, on the other into three, obsolete 

 teeth ; in several examples I find all the lower teeth decidedly 

 sharper than in the type, and the upper not quite so feebly 

 developed. If I have both sexes of this insect before me, the 

 sexual distinctions are very slight, but in that case probably the 

 specimen described is a female, as I have a much mutilated 

 example in which the clypeal tubercle is better developed than 

 usual, with the lines running from it to the bases of the antennae 

 evidently more elevated. 



Northern Territory of South Australia; collected by Dr. Wood, 

 also by Professor Tate. 



M^CHiDius CAvicEPS, sp nov. 



Oblongus ; sat convexus ; minus nitidus ; rufo-piceus ; setosus ; 

 capite prothoraceque fortiter crasse, elytris (seriatim, seriebus 

 haud geminatis) subtilius, punctulatis ; clypeo antice .sat longe 

 producto, utrinque fortiter concavo, antice triangulariter emar- 

 ginato ; unguibus haud simplicibus. 



[Long. 4 lines, lat. 2 lines (vix). 



The clypeus is con.siderably produced almost at a right angle 

 with the rest of the head ; its emargination is sharply triangular, 

 the sides of the same being acutely pointed in front ; the deep 

 concavity on either .side is extremely shining. The prothorax is 

 nearly twice as wide as down the middle it is long ; its sides 

 (owing to the roughness of the surface sculpture) are strongly 

 crenulate, strongly (almost angularly) rounded behind the middle 

 and not at all sinuate ; its hind angles ai-e slightly obtuse, but 

 very nearly right angles ; the granules of the punctures on the 

 surface fill them up and protrude above them, making the 

 prothorax appear almost tuberculate. The elytra are a little 

 dilated behind, where they are nearly a third as wide again as 

 the prothorax ; they are punctured in regular rows which have 

 no tendency to run in pairs, the punctures in the rows being 

 decidedly small as compared with those of the generality of species 



