442 REVISION OF THE GENUS HETERONYX 



H. ACUTIFRONS, Sp.nOV. 



Minus elongatus; postice dilatatus ; minus nitidus ; testaceo- 

 ferrugineus, capite prothoraceque nonnihil obscurioribus ; elytris 

 pilis brevibus erectis minus crebre vestitis; clypeo crassissime rugu- 

 lose, capite postice prothoraceque sparsius leviter nee rugulose, 

 elytris sat fortiter subrugulose, pygidio (hoc setis longis vestito) 

 sparsim obscure, punctulatis ; labro clypeum late triangulariter sat 

 fortiter superanti ; antennis 9-articulatis ; unguiculis bifidis. 



[Long. 2|-, lat. If lines (vix). 



The " trilobed outline " of head is very peculiar, the middle lobe 

 (which is longer, and scarcely narrower, than the lateral lobes) 

 being acutely triangular. The clypeus is very distinct from the 

 rest of the head, from which it is separated by a strong angulated 

 suture, its front being widely and rather strongly concave with 

 the reflexed margin obsolete in the middle. The prothorax is 

 twice as wide as long, its base scarcely half again as wide as its 

 front, which is gently concave, with scarcely produced angles ; the 

 sides are strongly rounded, the hind angles quite rounded off, the 

 base gently convex all across, evenly continuing the curve of the 

 angles. The elytra are punctured more strongly and very much 

 more closely than the prothorax ; their transverse wrinkling is 

 fairly defined, their lateral fringe normal, their apical membrane 

 obsolete. The hind coxae are decidedly shorter than the metaster- 

 num and decidedly longer than the 2nd ventral segment: the 

 puncturation of the metasternum is w^ell defined, and rather 

 strong and close at the sides, but the middle is almost Isevigate ; 

 the hind coxse are almost without puncturation. The ventral 

 segments are punctured sparingly and coarsely all across ; the 

 ventral series are scarcely conspicuous the whole ventral surface 

 being clothed somewhat densely with fine long hairs. The hind 

 femora are not much wider than the intermediate, their inner 

 apical angle is but slightly defined. The three external teeth of 

 the front tibite are fairly strong, the uppermost being about half 

 as large as the middle one. The apical piece of the hind claws is 



