178 THE CANADIAN ENTOMOLOGIST. 



d". Pronotum very obtusely angulate ; prozona distinctly longer 

 than the metazona 3 tegmina generally surpassing the hind femora, 

 the discoidal area of both sexes more or less irregularly reticulate, 

 but with no spurious vein ; ulnar area with a spurious vein in the 



female but not in the male compta. 



r. Male antennae a little longer than head and pronotum together, 



of equal size throughout and nowhere flattened decora. 



b'. Lateral carinas of pronotum distinctly, often greatly, divergent 

 both in front and behind. 



c\ Anterior ulnar vein of male tegmina distally much nearer the 

 radial than the lower ulnar vein. 



d\ Larger species. Narrowest (middle) portion of pronotal 

 disk more than three-fourths as wide as widest (posterior) 



portion obliquata. 



d'. Smaller species. Narrowest (middle) portion of pronotal disk 

 not more, generally less, than three-fourths as wide as the widest 

 (posterior) portion. 



e\ More or less variegated, the tegmina usually with a median 

 series of spots ; male antennae no longer than head and pro- 

 notum together \ hind margin of pronotum obtusely angulate. 

 _/'. Fastigium of vertex less sharply angulate and less promi- 

 nent, in the male advanced beyond the eyes by not more 

 than a third the length of the eye as seen from above, in the 



female generally rounded obtusangulate picturata. 



/'. Fastigium of vertex m.ore sharply angulate and more 

 prominent, in the male advanced beyond the eyes by half or 

 nearly half the length of the eye as seen from above, in the 



female generally distinctly rectangulate affinis. 



e-. Rarely variegated, the tegmina usually immaculate ; male 

 antennae longer than head and pronotum together ; hind margin 



of pronotum rounded, scarcely angulate speciosa. 



r. Anterior ulnar vein of male tegmina distally equidistant between 



the radial and lower ulnar veins desereta. 



A-. Discoidal area of basal half of female tegmina scarcely narrowing 

 distally and here nearly always occupied by more than one row of cells, 

 and little if any narrower than the ulnar area at its widest part; ulnar 

 area of male either divided into two series of cells by a more or less 



