REVISION OF THE GENUS HETERONYX, WITH 

 DESCRIPTIONS OF NEW SPECIES. 



By the Rev. T. Blackburn, B.A., Cork. Mem. Linn. Soc. N.S. W. 



Part IY. 



The present memoir carries on my revision of Heteronyx to the 

 end of the genns. In order to make this portion (Part IV.) of 

 the work as far as possible complete in itself in respect of the 

 species it deals with, I must remind the members of the Linnean 

 Society that for the purpose of my work I have proposed to divide 

 Heteronyx into 3 main divisions (or " Sections "), the 1st con- 

 taining those species in which the labrum is altogether below the 

 plane of the clypeus and invisible from above (as in most Melolon- 

 thidce) ; the 3rd containing those species in which the labrum is 

 dilated and directed upwards in such manner that its summit rises 

 above the plane of the clypeus ; and the 2nd containing species in 

 which the relation of labrum and clypeus is intermediate between 

 those indicated above. I have now to deal with the last part of 

 the 3rd Section. I subdivided it into groups of species having 

 8-jointed antennae (already dealt with), and those having 9-jointed 

 antennae. The latter of these groups I have subdivided according 

 as the claws are bifid (already dealt with) or appendiculate. The 

 present memoir deals with those species whose claws are of the 

 last-named form. 



In the course of a few months I hope to be able to offer to the 

 Society an appendix treating of a number of species that have 

 come into my hands during the issue of this " Revision" but too 

 late to be included in the sections to which they belong, and also 

 discussing those species previously described by other authors 

 which I have failed to identify. 



