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sexes) pronotum retuse in front, with four tuberosities which are 

 in female " not noticeable " (i.e., I suppose, very feeble) ; inter- 

 stices of elytra convex (no information as to their puncturation). 

 No species before me seems to fit this description. 



O. /issiceps, Macl. This species from the far North of W. 

 Australia must be extraordinarily like the insect that I regard as 

 O. JSrichsoni, Hope (from Port Essington) in many respects, but 

 as its author states that the front of its clypeus is emarginate (as 

 well as pointed and reflexed) in the male, and that some part of 

 the pronotum is rugulose, it is no doubt distinct. I have not 

 seen it. 



O. integriceps, Macl. The description of this species is a mere 

 enumeration of differences from O. fissiceps, so that it is difficult 

 to gain a clear notion of its characters, but the best idea I can 

 form of it seems to point to its being identical with the species 

 referred to above as O. Erichsoni, Hope. The size Hope gives 

 is Long., 4^1. Macleay says 6 1. My specimens vary from 41. 

 to 5 J 1. It should be noted however that the puncturation of the 

 pronotum is not mentioned by Macleay as a point of difference 

 from Jissiceps, and if it is 7iot different, — then integriceps is 

 probably a good species. 



O. salebrosus, Macl. This species (Long., 3 J 1.) from the far 

 North of W. Australia is black and nitid, with a non-carinate 

 head, the clypeus rounded in front, the pronotum rugulose, retuse 

 in front with four tubercles, the elytra tuberculate. It is no 

 doubt a very remarkable species, which I have not seen. 



O. Grotchi, Har, This is a large species (Long., 6J1.), its exact 

 habitat not recorded, its general colour dark brown with some 

 parts greenish, a single elongate horn on the head of the male 

 -(the only sex described), its pronotum punctulate and in front 

 retuse and feebly quadrituberculate. I have not seen any 

 Onthophagus resembling it, and cinnot determine its place in the 

 genus. 



O. lucidicoUis, Bohem. A fairly large species (Long., 4^1.), 

 reported from Sydney. I judge from the description that it must 

 be near O. australis, from which its "scarcely punctulate" 

 pronotum and dark antennal club seem to distinguish it. Its 

 male frontal characters are those of a very feebly developed male 

 australis. It seems also to resemble 0. tiveedensis, Blackb., 

 differing by inter alia its dark antennal club and the obtuse 

 front angles of its prothorax. 



O. purpureicoUis, Macl. This small species from N. Qaeeens- 

 land is very briefly described. It is said to be black, nitid, with 

 the pronotum purplish, the head with two small tubercles, the 

 clypeus acuminate and reflexed, the pronotum finely punctulate 

 and retuse in front, the elytra strongly striate (no information 



