287 



Australia agreeing so well with the description of //. torridum 

 that I am fairly confident of having identified it correctly. 



Before proceeding to the tabulation it is desiraljle to fur- 

 nish a note on one of the group characters that will be men- 

 tioned in it, viz., "Elytral intersices unequal." In the species 

 to which that expression applies the 3rd and 5th interstices 

 (especially the 3rd) are distinctly more convex than the 2nd 

 and 4th, and the 2nd and 4th (especially the 2nd) are nar- 

 rower {very much narrower in the hinder part) than the 3rd 

 and 5th. In the rest of the species the interstices are uni- 

 form in respect of convexity, and there is no great diversity 

 in respect of width. 



A. Elytra entirely striate. 



B. Elytral interstices unequal. 



C. Sides of protliorax more or less 



sinuate behind middle, hind 



angles acute. 



D. Joint 8 of antennae twice as wide 



as long 

 DD. Joint 8 of antennae less than 

 twice as wide as long. 

 E. Elytral interstices with con- 

 spicuous well-defined granules 

 EE. Elytral interstices closely 

 rugulose, not granulate 

 C'C. Sides of protliorax absolutely non- 

 sinuate, hind angles blunt 

 BB. Elytral interstices uniform — at most 

 a little diversity in width. 

 C. Sides of protliorax not sinuate be- 

 hind middle. 

 D. Prothorax at its widest across 

 base. 

 E. Front of clypeus with a deep 

 angular emargination. 

 F. Front tibiae stout and very 

 strongly dilated at apex ... 

 FF. Front tibiae slender, very 

 feebly dilated at apex 

 EE. Front of clypeus with a shal- 

 low arched emargination 

 DD. Protliorax notably wider about 

 middle than across base 

 CC. Sides of protliorax quite con- 

 spicuously sinuate behind middle 

 AA. Each elytron with only two strong 



striae, the outer striae obsolete 

 AAA. Elvtra without defined striation ... 



Mastersi, Mad. 



Walkeri, Champ. 

 Carpentariae, Blackb. 

 Macleayi, Blac'kh. 



Meyricki, Blac'kh. 

 Elder i, Blac'kh. 

 Victoriae, Blackh. 

 misellum, Blackh. 

 torridum, Champ.f?) 



Adelaidae, Blackh. 

 cowardense, Blackh. 



H. Mastersi, Macl. This species is near Walkeri, Champ., 

 and Carpentarice, Blackb. It is identical with a Hopafrum 

 sent by Mr. Perkins which (before I saw Mastersi) I had in- 

 tended to describe as new. It is easily separated from Wal- 

 heri by, inter alia, the non-granulate interstices of its elytra. 



