670 REVISION OF THE GENUS HETERONYX, 



that of the rest of the head, which does not form an evenly con- 

 tinuous plane with it and is separated from it by a strongly 

 impressed suture angulated in the middle and wavy towards the 

 sides. The prothorax is half again as wide as long, its base half 

 again as wide as its front which is sub-bisinuate with sharp feebly 

 produced angles ; its sides are feebly arched, and most divergent 

 immediately in front of the base, its hind angles very feeble but 

 appearing from a certain point of view not quite rounded o&, its 

 base feebly bisinuate but strongly lobed hindward all across, and 

 still more in the middle (somewhat as in H. gracilipes, mihi). The 

 elytra are very feebly and widely but somewhat uniformly costate 

 (somewhat as in H. potens, mihi), their lateral fringe being 

 normal and their apical membrane obsolete. The hind coxae are 

 much nearer the length of the metasternum (than which they are 

 not much shorter) than of the 2nd ventral segment. The meta- 

 sternum is punctured somewhat closely and evenly but not at all 

 coarsely, and is clothed with very long hairs ; the hind coxse are 

 punctured unevenly (in parts very coarsely) and have an irregular 

 antero-internal space smooth. The ventral segments are punc- 

 tured somewhat coarsely at the sides, but neither closely nor deeply, 

 the puncturation becoming more or less obsolete in the middle, 

 where however some more or less conspicuous longitudinal impres- 

 sions or scratches may be noticed on some of the segments. The 

 ventral series are but little conspicuous. The hind femora are not 

 much wider than the intermediate, their inner apical angle feeble 

 but quite distinct. The lower two teeth on the anterior tibiae are 

 strong and sharp, the uppermost being less than half as large as 

 the 2nd, the tibial outline straight from its base to the apex of 

 the uppermost tooth. The hind claws (including the apical piece) 

 are somewhat strongly compressed, their basal piece not much 

 longer than the apical and having its inner apex but little pro- 

 duced. The whole undersurface is minutely coriaceous and there- 

 fore sub-opaque. The 2nd joint of the hind tarsi is half again as 

 long as the 1st. Not closely resembling any of the preceding 

 species, but perhaps nearest to H. potens and its allies. The 

 puncturation of the upper surface is not unlike that of H. x>iceus, 



