1240 REVISION OF THE GENUS HETERONYX, 



side is punctured about as closely as the elytra, the punctures on 

 the metathorax being a little stronger than those of the elytra, and 

 on the ventral segments scarcely so strong ; the puncturation of 

 the metathorax and hind coxae becomes sparser towards the 

 middle line (the latter having a well defined Isevigate anteroin- 

 ternal space), that of the ventral segments scarcely sparser but 

 evidently finer. The hind coxse are about intermediate in length 

 between the metathorax and 2nd ventral segment. The hind 

 femora are a good deal wider than the intermediate and have their 

 inner apical angles blunt but fairly defined. The ventral series 

 consist of hairs and are not particularly conspicuous. The three 

 external teeth of the front tibise are strong and sharp, the upper- 

 most less than half as large as the 2nd. In the hind claws the 

 basal piece is quite twice as large as the apical, its inner apical 

 projection being small. 



The puncturation of this species is extremely similar to that of 

 H. torvus, Blackb. ; compared with that of H. piceus, Blanch., it 

 it is slightly finer and closer on the elytra, and much closer and 

 more asperate on the prothorax. 



Mulwala, N.S.W.; taken by Mr. T. G. Sloane. 



H. OBESUS, Burm. 

 I feel little or no doubt of the correctness of my identification 

 of this species, in which I am confirmed by Sir William Macleay. 

 It appears to occur over an exceptionally extended area ; I have 

 seen examples from Woodville, Kangaroo Island, Victor Harbour, 

 Port Lincoln (all in S. Australia), and King George's Sound. 

 Structurally it is very close to H. excisus, Blackb., but differs 

 very widely in superficial (Characters, the upper surface being 

 almost glabrous, the puncturation infinitely less close (that of the 

 hinder part of the head and of the prothoiax feeble and sparse,— - 

 spaced so that about 12 or 13 punctures of average distance apart 

 would range down the middle line of the prothorax, — that of the 

 elytra almost as sparse but much stronger), the uppermost tooth 

 of the front tibise smaller and the lower two teeth longer and 

 sharper. 



