284 NOTES ON AUSTRALIAN COLEOPTERA, 



B. Size considerably exceeding 3 lines. 

 C. Prothorax not closely punctulate. 

 D. "Trilobed outline" of head very 

 strongly defined, middle lobe 

 (i.e., labium) very narrow and 

 very prominent. 

 E. Prothorax strongly narrowed 



in front H. fervidus, Blackb. 



EE. Prothorax but little narrowed 



in front ... H. nasutus, Blackb. 



DD. "Trilobed outline" of head much 



less strongly defined H. ffranulifer, Blackb. 



CC. Prothorax closely punctulate H. normalis, Blackb. 



JBB. Size less than 3 lines ff. hrevicornis, Blackb. 



Heteronyx rhinoceros, sp.nov. 



Sat elongatus ; postice vix dilatatus ; minus nitidus ; pallide 



fusco-testaceus; minus distincte pubescens; clypeo crassissime 



rugulosofere tuberculato, capite postice prothoraceque fortiter 



sparsim, elytris (his subtiliter coriaceis et longitudinaliter 



obsolete carinatis) leviter subtilius sat sparsim, pygidio (hoc 



pilis erectis sparsim vestito) fere ut elytra sed magis obsolete, 



punctulatis ; labro clypeum fortiter sat late superanti ; 



antennis 9-articulatis ; unguiculis bifidis ; coxis posticis quam 



metasternum vix brevioribus, quam segmentum ventrale 



secundum multo longioribus. [Long. 3 J, lat. 1| lines. 



The sculpture of the clypeus (so coarsely rugose as to resemble 



a system of closely placed tubercles) is in itself almost sufficient 



to distinguish this species from all its congeners. The outline of 



the head is also remarkable, the labrum being so prominent and 



the sides of the clypeus so sti'ongly reflexed that the trilobed 



outline appears most exceptionally distinct, all the three lobes 



very well defined, the uiiddle one slightly narrower than the 



lateral ones, but projecting more strongly. The prothorax is 



twice as wide as long, very little narrower in front than behind, 



the front margin moderately emarginate, the base not distinctly 



