122 REVISION OF SYMPKTES AND HELiEUS, ETC., 



raifldle, greatest width behind middle, moderately convex, much 

 wider at base than at apex, apex arcuately emarginate, anterior 

 angles widely rounded, sides gradually rounded and widened till 

 near base, then a little incurved at the falcate and acute pos- 

 terior angles, these overlapping elytra, base strongly bisinuate, 

 foliate margins wide and flat, extreme border not reflexed, 

 margins finely roughened. Disc coarsely and closely punctured, 

 the punctures shallow and becoming smaller at base and sides, 

 intervals finely rui^ose, medial line indicated by smooth depres- 

 sion on centre of disc, basal fove* represented by large shallow 

 depressions. Scutellum curvilinear-triangular and sculptured as 

 prouotum. Elijtra{^ x 11 mm.), basal half subparallel, each with 

 three distinct subcrenulate costse extending from base to the 

 apical declivity, the outermost of these thinner and more crenu- 

 late tlian the other two, the suture more widel}'^ but less raised 

 throughout, the raised portion widening at the scutellary region;, 

 half-way between and exterior to these costte are less raised lines; 

 between the suture and the first costa are four lines of large 

 round punctures regularly placed at intervals rather greater 

 than the diameter of one of them, a short scutellary row of 

 similar punctures; in the intervals exterior to the first costa tlie 

 punctures indistinct, or concealed by the derm, with the excep- 

 tion of the rows of large punctures at the base of the costte; 

 foliate margins rather convex, much narrower than those of pro- 

 thorax, and becoming obsolete at apex. Presternum very convex 

 and carinate, produced backward into a tooth, received by the 

 nietasternum, and dotted with small pustules, metasternum with 

 strong medial sidcns, and, together with the underside of femora, 

 finely punctured; abdomen finely longitudinally strigose and 

 punctured, the last two segments punctured only. Dimensions 

 16x19 mm. 



H((h. — North-west Australia. 



A single specimen in the Macleay Museum, probably <^. It is 

 evidently a close ally of /-*. alternatus Pasc, and P. depressius- 

 culus Macl., but the former has its prothorax " minutely punc- 

 tured " and " no groove," its elytra are said to be " finely seriate- 



