BY REV. T. BLACKBURN. 187 



rubeola, Chp., siibovalis, Chp., oblonga, Clip., and Joraminosa, Clip.) 

 which I am satisfied that I have not seen, and which are not 

 sufficiently described to allow of my placing them in my tabula- 

 tion of the group. 



There thus remain nineteen already described species known 

 to me, and to these I have to add six new species, making twenty- 

 five, which will be found characterised in the following tabulation. 



As far as my observation goes this group contains an unusually 

 large proportion of rare species — -indeed, I know of only one (/*. 

 immaculata, Marsh.) which can be called common and somewhat 

 widely distributed. These insects are for the most part of firm 

 texture and but little liable to change in form or colour after 

 death. F. hmnaculata, Marsh., is the only one that I have found 

 to be subject to much variation, Maii}^ of the species are more 

 or less brightly coloured. It will be observed that in the tabu- 

 lation of this group I have made a good deal of use of colour and 

 markings as furnishing specific characters. I have done so 

 because by that means I am able to include in the tabulation 

 several species not known to me in nature, and which otherwise 

 I should have had to omit; but I have satisfied myself that the 

 species in question are not at all likely to be variable in respect 

 of the particular characters of colour that I have made use of : — 



A. Elytra with coarse confused punctures interrupted 

 on a large common area. 



B. Colour metallic brassy ccraria, Chp. 



BB. Colour not metallic, 



C. Form viewed from the side but little convex 



(almost as in P. Intacta, Newm.) _^;ic«(, Oliv. 



CC. Form decidedly more convex. 



D. External half of elytra more or less closely 

 and evenly punctulate (more or less as in 



picea) immaculata, Marsh. 



DD, External half of elytra very sparsely and 



irregularly punctulate semipunctata, Chp. 



AA. Elytra with confused punctures interrupted on 

 raised spaces of colour different from that of 

 the derm. 

 B. Elytra with regular rows of isolated raised spaces Echo, Blackb. 



