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 II. 



The species of Heteronyx to be dealt with in this second part 

 of my memoir form a group distinguished from the other groups 

 of Heteronyx by the possession of the following characters in com- 

 bination, viz., — upper margin of labrum rising above the plane 

 of the clypeus, antennae 8-jointed, claws appendiculate. No 

 species previously described have had all these characters 

 definitely attributed to them by their authors, although several 

 (in all probability) possess them. H. unicolor, Blanch., is 

 doubtful only in respect of its labrum (the author merely speci- 

 fying that its labrum is visible from above, whence it might 

 belong either to this group or to the group of what I have called 

 intermediate forms) ; there are independent objections however 

 to identifying with it any of the species before me. H. (Silopa) 

 glabrata, Er., fumata, Er., and nigella, Er., are all described 

 by their author as having 9-jointed antennae and bifid claws, but 

 M. Lacordaire has since asserted that their antennae consist of 

 eight joints only, and that the claws of nigella are appendiculate ; 

 if this be correct, nigella at least would fall into the group treated 

 of in this present article, and (as will appear below) I have 

 identified with it an insect sent to me from Tasmania (Erichson's 

 locality for all the three just named) by Mr. Sloane and the Hon. 

 W. Macleay, the latter of whom had attached the name to it. 

 Glabrata is a glabrous species of more than average size, while 

 fumata is described as having the pro thorax not narrowed in 



