BY THOMAS G. SLOANE. 259 



h. Elytra with third interstice normally bipunctate, the posterior 

 puncture before apical declivity. 

 i. Prothorax with posterior marginal puncture on border at basal 

 angle. 

 K. Metasternum with median longitudinal channel not extending 

 to apex, 

 /x. Elytra with tenth interstice short and feebly developed, 

 (lateral border widely reflexed at base, eighth interstice 



much wider than ninth on basal half) N. australasia. 



fxfi. Elytra with tenth interstice convex, long (extending on to 

 anterior half of elytra). 

 p. Basal border of elytra strongly dentate at humeral angles, 

 (eighth and ninth interstices narrow and convex) 



iV". incrassatus. 



vv. Basal border of elytra a little raised but not dentiform at 

 humeral angles. 

 I- Elytra with third interstice bipunctate; prothorax short, 



basal impressions oval N. leai. 



^^. Elytra with third interstice tripunctate ; prothorax 

 rather long, basal impressions long and narrow 



N. lateralis. 



KK. Metasternum deeply longitudinally channelled from base to 

 apex. 

 L. Prothorax short, cordate; elytra with 

 eighth and ninth interstices wide ; 



colour metallic 



LL. Prothorax long; elytra depressed, interstices sharply convex, 



eighth and ninth narrow; colour black N, liiagerus. 



ii. Prothorax with posterior marginal puncture not placed on lateral 

 border. 



M. Pronotum nitid (though usually finely striolate). 

 j. Prothorax with sides sinuate before base. 



77. Head and prothorax black; elytra obscurely coloured, with 



fiery cupreous margin N. queenslandicus. 



7777. Head and prothorax metallic; elytra with green margin, 

 p. Prothorax with base hardly wider than apex ( $ ) 



N. n itidicoUis. 



pp- Prothorax with base evidently much wider than apex 



($) N. latibasis. 



jj. Prothorax with sides not sinuate posteriorly. 



I. Form narrow; prothorax long, not wider at base than at 

 apex ; elytra with eighth interstice much wider than 

 ninth anteriorly, very narrow posteriorly — opposite the 

 elongate convex tenth interstice N. suhopacus. 



N. triplogenioides. 

 N. jervisensis. 



