874 AUSTRALIAN COLEOPTERA, WITH DESCRIPTIONS OF SEW SPECIES, 



The entire head is covered with small tubercles which are confused 

 and obscure on the clypeus. The prothorax is nearly twice as 

 wide at its widest part as down the middle it is long, and its base 

 is about two-thirds again as wide as its front margin ; its margins 

 are sinuately divergent from the front to slightly behind the 

 middle, where they are strongly and abruptly rounded, and then 

 with a strongly sinuated curve converge to the base, but in such 

 manner that they are nearly parallel close to the base and the 

 whole prothorax has a cordate appearance ; the front margin is 

 very strongly emarginate, the anterior angles well defined ; the 

 base is scarcely bisinuate, the hind angles small, acute and directed 

 obliquely outward and hindward ; the disc is strongly convex, the 

 lateral margins wide (together more than half the width of the 

 disc) and very strongly reflexed ; the surface of the entire segment 

 is confusedly covered with tubercles which are very small and 

 obscure towards the sides, but on the disc are considerably larger 

 and more shining and sparing ; the lateral edges are strongly 

 crenulated. Tiie scutellum is situated at the bottom of a depression 

 in the elytra. These latter are not quite a quarter as long again 

 as together wide, and are evenly and gently rounded laterally (the 

 humeral angles quite rounded off) ; each of them bears four rows 

 of strong, slightly shining, conical tubercles (about 7 or 8 tubercles 

 in each of the inner two rows, about 5 or 6 in the next, and 

 about i in the outer one, which is close to the margin) ; some of 

 the tubercles are larger than others, but the large and small ones 

 are pretty evenly distributed along each row ; the tubercles have 

 a little tendency to an elongate ridge-like form close to the base 

 and those of the outmost row are mostly a little smaller than the 

 rest ; the spaces between the rows of tubercles and between the 

 tubercles in the rows is all uniformly rugose and finely but not 

 closely punctured ; the suture of each elytron is thickened and 

 crenulate ; between this and the first row of tubercles, and also 

 in each interval between the rows of tubercles are a few very 

 small tubercles ; there is no defined line separating the upper 

 surface of the elytra from their epipleurse (which are strongly 

 punctured)*, but a fairly distinct thickening of the margin (most 



