150 REVISION OF THE GENUS HETERONYX, 



except that the middle lobe appears proportionally narrower owing 

 to the greater convexity of the upper outline of the labrum ; 

 clypeus almost forming an even surface with the rest of the head; 

 clypeal suture slightly wavy and not well marked. Prothorax 

 very nearly twice as wide as long down the middle, its base more 

 than half again as wide as its front which is only gently emarginate, 

 with angles but little produced ; its sides diverge in a slight curve 

 from the apex to the base with which they form angles that from a 

 certain point above appear quite sharp, and somewhat directed 

 hindward; the base rather feebly bisinuate and moderately lobed in 

 the middle. Elytra with little or no indication of striae, their 

 transverse wrinkling very fine, but from some points of view fairly 

 distinct, their lateral fringes normal, their membranous apex well 

 defined. The puncturation of the prothorax is evidently coarser, 

 and that of the elytra evidently more minute, than in H. normalis. 

 The hind femora are moderately wider than the intermediate, with 

 their inner apical angle feeble and rounded. The hind coxaB are 

 considerably shorter than the metasternum and evidently longer 

 than the second ventral segment. The metasternum and hind 

 coxae are rather strongly and closely punctulate at the sides, the 

 puncturation continuing more markedly than in most species 

 across the middle, the latter having a smooth portion only towards 

 the antero-internal corner. The hind body is punctured a little 

 less strongly, the punctures being much enfeebled in the middle. 

 The ventral series consist of fine hairs and are not very con- 

 spicuous. On the anterior tibiae the lower teeth are long and 

 sharp, but the uppermost is very small, evidently less than half 

 the second. 



Adelaide district. 



H. MuLWALENSis, sp.nov. 



Sat elongatus ; postice vix dilatatus ; sat convexus ; ferrugineus, 

 antennis palpi sque testaceis ; pilis adpressis vestitus ; capite toto 

 creberrime sequaliter rugulose, elytris crebre subtiliter, pygidio 

 sparsius sat subtiliter, punctulatis ; tibiarum anticarum dentibus 



