440 REVISION OF THE GENUS HETERONYX, 



gently arched, the basal angles much rounded off; the base is 

 gently bisinuate and feebly lobed hindward in the middle. The 

 transverse wrinkling of the elytra is very slight, their lateral 

 fringe normal, their apical membrane narrow but distinct. On 

 the head, front of prothorax, and pygidium are a few long erect 

 hairs. Owing to the want of transverse wrinkles on the elytra 

 the sculpture has a distinctive appearance ; perhaps of the com- 

 moner species hitherto described H. testaceus, Blackb., comes 

 nearest to it in that respect, but has somewhat finer sculpture 

 throughout. The hind coxae are much shorter than the meta- 

 sternum and very decidedly longer than the 2nd ventral segment ; 

 they and the metasternum are rather sparingly and strongly punc- 

 tured at the sides, — the former being impunctulate, the latter finely 

 punctulate, internally. The puncturation of the ventral segments 

 is much finer than that of the sides of the metasternum but is con- 

 tinuous all across. The ventral series consist of coarse red hairs 

 but are rather inconspicuous. The hind femora are not much 

 wider than the intermediate, their inner apical angle being fairly 

 defined but scarcely prominent. The three external teeth of the 

 anterior tibias are extremely robust and sharp, the uppermost 

 being about half as large as the middle one. The apical piece of 

 the hind claws is scarcely a quarter the size of the basal piece and 

 is scarcely so large as the produced apex of the latter. The basal 

 joint of the hind tarsi is very distinctly shorter than the second. 



The real allies of this species appear to be among the group with 

 8-jointed antennae, — H. piger, lateritius, &c., to some of which it 

 bears much resemblance. From H. sich/uscus, Macl., it differs 

 inter alia by its much more strongly and narrowly elevated 

 labrum. 



N. Territory of S. Australia ; taken by Dr. Bovill. 



H. SPARSUS, sp.nov. 



Sat elongatus ; postice vix dilatatus ; sat nitidus ; ferrugineus 

 (exempli typici capite prothoraceque obscurioribus) ; pilis brevibus 



