152 REVISION OP THE GENUS HETERONYX^ 



clypeal suture well marked and gently arched. Prothorax deci- 

 dedly less than twice as wide as it is long, its base about half 

 again as wide as its front which is rather strongly emarginate and 

 subbisinuate, with angles little advanced and not very pointed ; 

 its sides are gently arched but scarcely convergent from the middle 

 to the base ; the hind angles viewed from a certain point above 

 appear fairly defined and a little directed hindward but not sharp ; 

 the base moderately bisinuate and moderately lobed in the middle. 

 Elytra with some indication of striae, their transverse wrinkling 

 not conspicuous, their lateral fringes normal, their apical membrane 

 fairly developed. The puncturation of the upper surface as a 

 whole closely resembles that of H, graciUiJes. The hind femora are 

 moderately wider than the intermediate with their inner apical 

 angle scarcely at all prominent. The hind coxae are decidedly 

 shorter than the metasternum but considerably longer than the 

 second ventral segment. The metasternum is moderately coarsely 

 punctured all across, the hind coxae are punctured much like the 

 metasternum but are laevigate on the inner anterior portion. The 

 ventral segments and anterior tibise scarcely differ from those of 

 H, puncti2)ennis except that the uppermost tooth of the latter is 

 still less developed. 



King George's Sound; in the collection of the Hon. W. Macleay. 



H. RATJCINASUS, Sp.nov. 



Elongatus ; sat convexus ; postice leviter dilatatus ; sat nitidus ; 

 piceo-ferrugineus, antennis palpisque testaceis, pilis adpressis sat 

 brevibus albidis vestitus ; capite crebre rugulose, prothorace spar- 

 sius fortiter, elytris squamose sat crebre, pygidio sparsim sat 

 fortiter, punctulatis ; tibiarum anticarum dentibus externis ro- 

 bustis ; labro clypeum sat fortiter minus late superanti (illo 

 antice ruguloso) ; antennis 8-articulatis ; unguiculis appendiculatis. 



[Long. 44, lat. 2f lines. 



Clypeus very slightly emarginate and with the reflexed margin 

 scarcely indicated in the middle ; " trilobed outline " of head well 



