488 revision of the australian species of bolboceras, 



Tabulation of Species. 



Group i. 



Males. 



*A. Frontal horn longitudinally carinate on its front Albertisi, Har. 

 AA. Frontal horn not longitudinally carinate on its 

 front. 

 B. Retuse area of pronotum concave. 

 C. Antennal club normal. 

 D. Frontal horn non-pilose. 

 E. Interval between apices of horns of pro- 

 notum much wider than head. 



F. Frontal horn dentate behind angulicorne, Mad, 



FF, Frontal horn unarmed behind. 



G. A deep sharply defined longitu- 

 dinal median sulcus on surface 

 of retuse area of pronotum ... hippopus, Mad. 

 GG. Eetuse area of pronotum not as 



in G cornutum, J/acL 



EE. Interval between apices of horns of 

 pronotum not wider than head. 

 F. 14th and 15th striae of elytra con- 

 fluent in front rhinoceros, Mad. 



FF. 14th and loth striae of elytra not 



confluent Macleayi, 5Zacfe&. 



DD. Frontal horn pilose. 



E. Horns of pronotum branched, — the 

 froijt branch long, porrect, — the hind 



short, erect Eeichei, Guer. 



EE. Horns of pronotum not as in E. 



F. Pronotum without concavities across 



or behind the retuse portion. 



G. Tibiae (especially the hind) com- 



parativelyshort and wide (nearly 



as much so as in rhinoceros, 



Macl.) cavicolle, Mad. 



GG. Tibiae notably more elongate 



and slender cornigerum, Mad. 



* The names printed in italics are those of species which I do not feel 

 confident of having seen, and whose place in the tabulation is more or less 

 conjectural, being based upon the authors' descriptions. 



