277 



little expanded in front of the eyes) and the base of the pronotum 

 with its marginal furrowrather narrowand notdilatedand flattened 

 in the middle, and its marginal raised edging much stronger. The 

 distance between the external tubercles of the pronotum is much 

 greater than the width of the head. I have named this species 

 after Mr. T. G. Sloane, who is doing such admirable work on the 

 Australian Carahidce. 

 N.W. Australia. 



0. pugnax, Har. Judged by the description this species must 

 be very close to 0. atrox, Har., although its author does not refer 

 to the other in the description of either. I have examples of an 

 Onthophagus from Brisbane (the habitat cited by Harold) which I 

 think must be pugnax, and they are extremely .close to the species 

 that I have (above) called atrox. They are of shorter and broader 

 build and are not so opaque; the retuse front of their pronotum 

 is not pilose and the structure of the base of their pronotum is as 

 in 0. Sloa7iei, from which species they differ inte?' alia in the 

 front of their clypeus not being emarginate. The distance 

 between the external tubercles of their pronotum is greater than 

 the width of the head. The differences between pugnax and 

 atrox in respect of the sexual characters of the head appear to be 

 chiefly in degree rather than kind, and I cannot attach very 

 much importance to them. 



0. pugnacior, sp. nov. (mas). 0. Sloanei, Blackb., maris affinis ; 

 differt capite pronotoque paullo minus nitidis ; illo latiori, 

 ante oculos sat fortiter dilatato ; clypeo brevi latissimo 

 antice rotundato ; carina clypeali subobsoleta, in parte 

 mediana nuUo mode elevata, carina frontali antrorsum 

 fortiter arcuata ; pronoti parte retusa subobsolete punctulata, 

 dorso minus fortiter ruguloso, carina arcuata transversa 

 leviter tantum sinuata nullo modo tuberculata ; elytrorum 

 humeris coriaceis haud nitidis ; metasterno (lateribus excep- 

 tis) multo minus fortiter punctulato. Long., 7 J 1.; lat., 4 1. 

 This species is so closely allied to 0. Sloanei, that it seems use- 

 less to repeat the diagnosis at full length ; the diagnosis applies 

 exactly to this species except in so far as specified above. The 

 extreme feebleness of the clypeal carina makes the frontal carina 

 (without being absolutely more elevated than in Sloanei) much 

 more elevated in comparison with the former. The external teeth 

 of the front tibse are much more feeble in my example of 

 pugnacior than in Sloanei, but I doubt whether this is a constant 

 character. The structure of the basal margin of the pronotum 

 readily distinguishes pugnacior from all the other species known 

 to me of this group except Sloanei and the species mentioned 

 above as pugnax, Har. It is even closer to the latter than to 

 Sloaneij from which it differs in all the respects mentioned above 



