428 REVISION OF THE GENUS HETERONYX, 



E. Appendiculation of claws very 



minute and close to apex lividus, Blackb. 



EE. Appendiculation of claws not 

 particularly minute and 

 close to apex 



F. Prothorax closely {vide ant. 

 p. 139) punctured 



G. Joints 1 and 2 of hind 



tarsi equal subfuscus, Macl. 



GG. Joint 2 of hind tarsi 



longer than 1 horealis, Blackb. 



FF. Prothorax sparingly punc- 

 tured sparsus, Blackb. 



DD. Middle lobe of trilobed outline 



appearing sharply triangular acutifrons, Blackb. 



CC. Relation of labrum to clypeus such 

 that the outline of the head is 

 not distinctly tiilobed rotundifrons, Blackb. 



Heteronyx potens, sp.nov. 



Sat brevis ; sat convexus ; postice vix dilatatus ; minus nitidus ; 

 obscure ?eneo-niger ; pilis pallidis parum perspicuis minus crebre 

 vestitus ; capite (clypeo sat crebre ruguloso excepto) prothoraceque 

 sparsius leviter subcrasse, elytris (his substriatis) sparsim leviter 

 crasse, pygidio subobsolete, punctulatis ; labro clypeum anguste 

 leviter superanti ; antennis 9-articulatis ; unguiculis bifid is ; coxis 

 posticis metasterno vix brevioribus. [Long. 2J-3J, lat. lf-2 lines. 



The "trilobed outline" of the head is fairly well-marked, the 

 middle lobe being about as long, but less than half as wide, ag 

 either of the lateral ones. 



The upper edge of the turned-up labrum rises slightly above 

 the surface of the clypeus ; the latter is concave in front with its 



