278 



JScarabaeidae. In general it may be noted as having a 

 rostrum-like prolongation of a dilated and angular basal 

 portion; the basal portion usually has a semi-double tubercle 

 in the middle of its base, but this may be sometimes extended 

 until it is on the apical portion; the basal portion varies 

 from about one-fourth longer than the apical portion to less 

 than half its length. The tip may be simple, produced down- 

 wards in a subcorneal process, or in a more or less con- 

 spicuously bifid one. The lower-surface from the tip may be 

 continued in a more or less even curve to the base, or 

 distinctly inflated from just beyond where the apical portion 

 commences; but in one form (pi. xxxiii., fig. 38) there is an 

 elongated, narrow, bifid process attached to the lower surface 

 near the base; on this form the apical portion is always long, 

 with its tip turned down and conspicuously bifid ; it appears 

 to be the typical one, but is much rarer than many of the 

 others. I have seen no specimen with the lower process 

 small or simple. 



Hah. — Queensland, New South Wales, Victoria, South 

 Australia. 



BOLBOCERAS BAINBR7DGET, Westw. 

 PI. xxxiii., figs. 61 and 62. 



The type of this species, as described and figured by 

 Westwood, was a female, not a male, as he presumed; the 

 male differs in having the concave portion of the prothorax 

 larger, deeper, with much sparser punctures, and with the 

 horn in front much larger; the head is very different, being 

 widely flattened' (or feebly concave) and impunctate between 

 the eyes and a distinct tubercle behind each of these, the 

 space in front of the eyes is also flattened, but with a distinct 

 upward trend, with coarse punctures and without upright 

 tubercles, but each side in front produced into an acute 

 process overhanging the mandibles. On one small male, 

 however, the frontal processes and the horn on the prothorax 

 are smaller. Tire colour of both sexes varies from light 

 •castaneous to dark reddish-brown. 



Hah. — Western Australia: Warren (!) and Swan Rivers. 



BOLBOCERAS TAURUS, Westw. 



]j . puncticolle, Macl. 



PI. xxxiii., figs. 52 and 53. 



The above synonymy, as given by Blackburn, appears to 



be correct; but he referred the species to his second group. 



although the front margin of the prothorax is deeply 



bifoveate (a character noted by both Westwood and Macleay). 



(i) Several pairs, sent at the same time, by Mr. W. D. Dodd. 



