BY THE REV. T. BLACKBURN. 843 



In the example before me of this very fine insect the frontal 

 horn rises to about the level of the top of the prothorax, and is 

 ■quadrangular in shape at the base, a keel running from each of the 

 front angles about a quarter of the distance up it, and from each 

 of the hind angles about two-thirds the distance to its summit ; 

 the upper part is cylindric and tapering. The prothorax is 

 strongly and roughly punctured on the sides, this sculpture being 

 continued up the portion adjacent to the excavation, but the 

 middle and basal parts are smooth, except in the deep basal furrow 

 where, however, the puncturation is wanting in the middle ; the 

 excavation occupies the larger part of the whole surface, and is 

 cavernous, with sharply defined limits especially on the sides; the 

 horns (or teeth) are about half as long as the distance from the 

 base of the prothorax to that of the excavation, are compressed, 

 and triangular, their wide face being about as wide across the base 

 as the lower (which is the longer) side of their outline ; they are 

 situated on either side of the excavation, about half-way down the 

 declivous face of the prothorax and project forward, and slightly 

 upward ; the portion clothed with golden hairs is the inner surface 

 of the overhanging margins. 



The nearest ally of this species is, I think, B. cavicolle, Macl., 

 from which it differs inter alia by the transverse carina in front of 

 its frontal horn being evenly arched forward and not at all turned 

 up in the middle, by the absence of a tooth on the hind surface of 

 the frontal horn, by the very much larger excavation on its 

 prothorax, by the presence of golden pubescence within the same, 

 by the much more feebly punctulate sti'ije of its elytra, and its 

 very much more slender front tibise, the inner margin of which is 

 evenly and gently concave from the base to the apical spine. 



Northern Territory of S. Australia ; taken by Professor Tate. 



B. GLOBULIFORMB, Macl. 



The description of this species does not indicate any satisfactory 

 distinction from that of B. rotundatum, Hope. There are 

 specimens before me evidently, I think, appertaining to the latter 



