432 REVISION OF THE GENUS HETERONYX, 



The part of the labrum overtopping the clypeus is wide and but 

 slightly elevated, while the sides of the clypeus are well-reflexed, 

 so that the " trilobed outline " of the head appears only 

 moderately defined, with the middle lobe half as wide, and 

 scarcely so long, as the lateral lobes. The clypeus does not 

 form a continuous surface with the rest of the head from which 

 it is separated by a well-defined sub-angulated suture ; its punc- 

 turation is finer and closer than that of the rest of the surface. 

 The sculpture of the upper surface is in all respects extremely 

 similar to that of H. nigellus, Er., albeit the puncturation of the 

 prothorax is a little closer. The prothorax is a little more than 

 half again as wide as long, its base not much more than a quarter 

 again as wide as the front which is only moderately concave with 

 angles little produced and rather blunt ; the sides are gently 

 arched, the hind angles viewed from above appear distinct and 

 almost rectangular ; the base is slightly bisinuate and but feebly 

 lobed hindward. The lateral fringe of the elytra is normal, the 

 apical membrane of the same scarcely apparent. The hind coxae 

 are much shorter than the metasternum and not much wider than 

 the 2nd ventral segment. The puncturation of the under surface 

 is large, sparing, and lightly impressed except on the sides of the me- 

 tasternum where it is fairly close and deep ; on the ventra^ segments 

 it is very ill-defined. The ventral series consist of long testaceous 

 hairs. The hind femora are moderately wider than the interme- 

 diate and have their inner apical portion but little prominent and 

 obtusely angulate. The anterior tibise are like those of H. pote^is. 

 The apical piece of the hind claws is scarcely a quarter the size of 

 the basal piece and is very little larger than the produced apex of 

 the latter. 



Wagga Wagga, N.S. Wales; in the collection of Sir W. 

 Macleay. 



H. ARIDUS, sp.nov. 



Sat elongatus ; postice minus dilatatus ; subnitidus ; supra 

 subtilius leviter, crebrius (clypeo paullo crassius) punctulatus ; 



