BY REV. T. BLACKBURN. 167 



GG. Elytra strongly convex longitudin- 

 ally (height, viewed from side, 

 not less than half length, at any 

 rate in $ ). 

 H. Discal puncturation of elytra very 

 sparse (more so than in P. ob- 



so/efa, Marsh.) cerea, Blackb. 



HH. Discal puncturation of elytra 

 much closer. 



I. Form extremely convex longi- 



tudinally (height of elytra in 

 2 , viewed from side, § of 

 length) affinis, Blackb. 



II. Form distinctly less convex 



longitudinally. 

 J. Disc of elytra studded with 

 unpunctured more or less 

 elevated spaces conspicu- 

 ously larger than the aver- 

 age interstices of the punc- 

 tures. 

 K. Elytra having a common 

 subsutural area almost 



punctureless aciculata, Chp. 



KK. Elytra having a common 

 subsutural area finely 

 but very distinctly punc- . 



tured variolosa, Marsh. 



JJ. Spaces on disc of elytra inter- 

 rupting the general punc- 

 turation almost wanting. 

 K. Greatest heighth of elytra 

 (viewed from the side) 

 notably in front of the 



middle Loionei, Bsdj (?) 



KK. Greatest height of elytra 

 (viewed from the side) 



close to the middle Wilsoni, Baly. 



FF. Discal puncturation of elytra evenly 

 spaced or nearly so; if not, size 

 notably smaller than in aggregate 

 "F." 



