82 



SUBANTARCTIC ISLANDS OF NEW ZEALAND. 



[Coleoptera. 



LIST OF COLEOPTERA FROM THE SUBANTARCTIC ISLANDS OF NEW ZEALAND— contt!. 



Group CNEMACANTHIDAE. 



Mecodema, Blanchard. 



Body elongate, more or less convex. Head rather narrower than front of thorax. 

 Eyes rounded and prominent. Labrum transverse, rounded in front. Mentum 

 large, deeply emarginate, with a short median tooth, which is sometimes grooved 

 near its apex. Palpi with elongate moderately thickened terminal joints, truncate 

 at extremity. Mandibles robust, more or less elongated, the right with an inner 

 tooth. Thorax cordiform. Elytra elongate, more or less oviform. Anterior tibiae 

 dilated, strongly emarginated, and spined inwardly near the extremity, sometimes 

 slightly prolonged externally at the apex ; the intermediate usually somewhat 

 prominent externally at the apex ; the posterior simple. Tarsi with the basal 4 

 joints cordate, the outer angles of the first 3 slightly prominent in the male, nearly 

 glabrous underneath. Antennae rather short, not attaining base of thorax, basal 

 3 articulations of nearly equal length, joints 5 to 11 pubescent. 



Oregus has almost securiform terminal joints to the maxillary and labial palpi. 

 The tibiae are not angulate or produced at the extremity. 



In Metaglymma the palpi have moderately slender terminal joints ; these are 

 rounded at the apex. The tibiae are dilated and strongly prominent at the extremity, 

 and the antennae are very sparingly pubescent. 



I have not seen Blanchard's description, but the above details will define the 

 genus with sufficient accuracy. 



