500 REVISION OF THE AUSTRALIAN SPECIES OF BOLBOCERAS, 



and is a flat surface, whereas in cavicolh the retuse area is some- 

 what concave owing to its defined upper outline being evidently 

 protuberant in its whole length so as to slightly overhang the 

 retuse area. In other respects I do not find any definite dis- 

 tinctive character on the pronotum, nor do the elytra diflfer in 

 any notable manner from those of cavicolle. Of the females of 

 the other species of the same group having the elytra similarly 

 striate and the front tibise similarly toothed, B. aiigulicoryie, MacL, 

 differs by the presence of somewhat closely and evenly distributed 

 large feeble punctures on the retuse front of the pronotum; 

 hippo^nis, MacL, by the peculiar humeral angles of its elytra; 

 and rhinoceros, MacL, and the species referred to above as pro- 

 bably neglectum, Westw., by the defined upper outline of the 

 retuse front of their pronotum being bent backward at its 

 extremities in such fashion that if continued in the same direc- 

 tion it would pass through the sublateral fovese of the pronotum. 



B. Tatei, Blackb. 



The pilosity of the concave area on the front part of the pro- 

 notum renders the male of this species very distinct from the 

 other described Australian Bolbocerata. It is also remarkable 

 on account of the extraordinary development of its antennal club, 

 the basal and apical joints of which are ver}^ strongly convex, 

 with the result that the club is globular, and that its second joint 

 is scarcely visible. The apical joint of the club is much larger 

 and more convex than the basal joint. 



B. Macleayi, sp.nov. 



Mas. Latum, robustum; modice nitidum; supra glabrum; subtus 

 hirsutum; rufo-piceum; mandibulo sinistro (superne viso) extus 

 pone apicem fortiter sinuato; capite ante eminentiam frontalem 

 confertim ruguloso, pone banc nitido obsolete punctulato; fronte 

 subhorizontali; eminentia frontali ut cornu simplex subrectum 

 elevata; prothorace fortiter transverso, supra fere laevi (parte 

 laterali utrinque confertim rugulosa excepta), antice area magna 

 profunde concava impresso, parte concava antice cornu suberecto 



