BY REV. T. BLACKBURN. 251 



B. The elytral series run very conspicuously in pairs nupta, Blackb. 

 BB. The elytral series not placed in pairs. 



C. The highest part of the elytra very elevated 

 and notably in front of the middle of the 



lateral outline (viewed from the side) remota, Germ. 



CC. Elytra less convex and with the greatest 

 height not nearly so far forward. 

 D. Antennae with joints 5- 10 much compressed, 

 and black or nearly so. 

 E. The scutellum, and 2 spots on the head, 



black stictica, Marsh. 



EE. Scutellum testaceous ; head without 



black spots inspersa, Newm. 



DD. Antennffi filiform or nearly so; testaceous 

 or scarcely infuscate. 

 E. Head nitid, and not punctured particu- 

 larly closely madida, Blackb. 



EE. Head opaque owing to very close punc- 



turation opaciceps, Blackb. 



P. TESSELLATA, Clk. 



There is an element of doubt about my identification of this 

 species inasmuch as I have not seen an authentic type, and the 

 specimens which I regard as tessellata were not taken in Western 

 AustraHa (the locaKty cited by Clark) but in South Australia, on 

 Eyre's Peninsula. These specimens, however, agree so well with 

 the description (especially in respect of the elytral markings, 

 which are quite difterent from those of any other species known 

 to me) that I feel fairly confident in naming them. It is note- 

 worthy, however, that Clark does not mention the submarginal 

 sulcus of the prothorax which seems to be the principal structural 

 distinction of the species among its near allies. Clark, however, 

 does not compai-e it with any other species of this subgroup, Avhich 

 may account for his not mentioning the sulcus. The insect is 

 about 3 J lines long with filiform testaceous antennas. The elytra 

 are pale fuscous with about 10 rows of somewhat square testaceous 

 blotches on each of them, each row containing about 10 of the 

 blotches and each blotch having in its centre a piceous puncture. 



