16 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 124 



Remarks. — Pterostichus inopinus and P. pumilus willamettensis 

 have been confused with northern specimens of infernalis. Externally 

 they can be distinguished readily by their dentate humeri and punc- 

 tate mesepisterna. Southern form specimens of infernalis externally 

 are nearly identical with pumilus pumilus; females can be identified 

 on the basis of the punctures on the mesepisternum. 



The fenyesi Group 



This group includes two species, fenyesi Csiki and cochlearis, new 

 species. The fenyesi and inopinus groups are similar except for some 

 of the aedeagal characteristics. They occupy adjacent and slightly 

 overlapping areas. The following characteristics are shared by both 

 species of the fenyesi group. 



Color of body. — Piceous. 



Head. — Eyes normally large and prominent; sharp frontal impres- 

 sions forming an angle greater than 45°, diverging posteriorly; micro- 

 reticulate. 



Pronotum. — Sides entirely arcuate; hind angles obsolete; posterior 

 pair of setiferous punctures far forward, about even with middle of 

 longitudinal impressions; outer pair of longitudinal impressions absent; 

 base weakly bisinuate; basal transverse impression complete; area 

 between sharply impressed longitudinal impressions and lateral 

 gutter tumid; disc microstrigulose and partly microreticulate. 



Elytron. — Humerus very rounded; humeral dentation small, at 

 most, subrectangular; scutellar stria present though sometimes short; 

 scutellar puncture present; eighth stria with six anterior setiferous 

 punctures, one intermediate, usually seven in posterior series; two 

 setae at posterior end of seventh stria; microreticulate. 



Ventral surface.- — Coarse punctures confined to mesepisternum; 

 tip of prosternum usually completely margined. 



Legs. — Hind trochanter blunt and about half the length of hind 

 femur; setae present on ventrolateral margins of last article of tarsus. 



Sixth abdominal sternum of male. — Apical edge thickened; lobe 

 small or obsolete. 



Aedeagus. — Right paramere not elongate, somewhat enlarged. 

 Median lobe with raised area where left paramere rests. Internal 

 sac with small, lightly sclerotized tooth and adjacent lobe. 



Length of body. — 6.0 to 8.5 mm. 



Remarks. — The two species in this group are related closely. The 

 primary differences between the two are found in the aedeagi although 

 there are also small differences in the shape and midline of the pro- 

 notum and in the lobe on the male sixth abdominal sternum. Ptero- 

 stichus fenyesi can be divided into two forms on the basis of aedeagal 

 and pronotal characteristics. I have named them subspecies. Unfor- 



