267 



The following tabulation shows the relation to each other of 

 the groups : — 



A. Raised marginal edging of sides of pronotuin continues 

 evenly along the base (all the known species large and 

 rugulose) ... ... ... ... ... ... Group I. 



AA. The raised marginal edging of sides of pronotum becomes 

 at least enfeebled at the hind angles. 

 B. Pronotum bordered at base by a distinct gutter and 

 raised edging. 

 C. Eyes not visibly facetted on surface ... ... Group II. 



CO. Ej^es distinctly facetted on surface ... ... Group III. 



BB. Pronotun bordered at base only by a pseudo-margin (as 



described above) ... ... ... ... Group IV. 



BBB. Pronotum bordered at base only by a raised line ... Group V. 

 BBBB. Pronotum not margined at base ... ... Group VI 



It should be added that occasional specimens of those 

 Onthophagi the surface of whose eyes is not perceptibly facetted 

 have the eyes of a pale colour, — perhaps due to immaturity, — 

 and that in that case underlying facets are quite conspicuous 

 through the smooth surface, but there is not any difficulty in 

 seeing that the surface itself is quite smooth. 



In the following tabulation the characters cited (unless other- 

 wise stated) are as far as known to the author common to both 

 sexes. 



It is quite possible that the examination of the other sex of 

 some few species of which I have seen only one sex may pros^e 

 that I have in tabulating relied upon characters that are not 

 truly specific in respect of those particular species, but I am very 

 confident that all the Onthophagi before me and tabulated below 

 as distinct species, are really so. 



Tabular statement of the characters of the Australian 

 Onthophagi : — 



Group I. 

 A. A horn or tubercle in both sexes on pronotum between median pro- 

 tuberance and lateral margin. 

 B. The frontal projection in both sexes a horn pentacanthus, Har. 

 BB. The frontal projection in both sexes a 



lamina ... ... ... Leai, Blackb. 



A A. No horn or tubercle in either sex on pro- 

 notum between median protuberance and 

 lateral margin. 

 B. The front of the frontal horn rugulose and 



opaque ... ... ... Mniszechi, Har. 



BB. The fro at of the frontal horn (at any rate 



in the male) nitid and almost smooth ... ferox, Har, 



Group II. 

 A. Front of pronotum subvertical (in both sexes 

 so far as known). 

 B. The retuse front topped by a widely arched 

 carina and (on each side) a tubercle. 

 C. The bxsal gutter of the pronotum dilated 

 hindward in the middle. 



