110 R. W. Dawson 



28. Pubic process as long as, or longer than, the supporting inferior 

 plates congrua 



Pubic process small, much shorter than the supporting plates.. ../Msca 



29. Terminal portions of the pubic process rather long, slender, 

 distinctly narrowed beyond the middle, and with the inner edges 

 nearly parallel to the tips inversa 



Terminal portions of pubic process more or less distinctly di- 

 vergent, the inner edges never parallel to the tip 30 



30. Pubic process large, the basal portion distinctly larger and 

 heavier than the terminal portion 31 



Pubic process smaller, the basal portion smaller than the term- 

 inal portion 32 



31. Pronotum coarsely and rather densely punctured, with a 

 slightly elevated smooth, median line rugosa 



Pronotum less coarsely and densely punctured, and without the 

 smooth line through the middle horni 



32. Pronotum coarsely pitted corrosa 



Pronotum moderately or finely punctured 33 



33. Pronotum viewed from above wider across the base than at the 

 middle; larger species, length 19-22 mm 34 



Pronotum wider across the middle than at the base; smaller 

 species, length 15-19 mm 35 



34. Pubic process small and deeply divided, superior genital plates 

 small; color usually dark or blackish brown vehemens 



Pubic process larger, less deeply divided, superior genital plates 

 larger; color usually more of a reddish brown draki 



35. Narrow rim or margin of sides of pronotum finely broken or 

 serrated 36 



Narrow rim of margin of sides of pronotum entire, not ser- 

 rated 37 



36. Terminal portions of pubic process slenderer, somewhat taper- 

 ing to their rounded tips bipartita 



Terminal portions of pubic process broader, not tapering, 

 bluntly rounded or truncate at the ends anxia 



216 



