14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 124 



Length of body. — 9.0 mm. 



Allotype female. — Same as holotype except for usual female 

 characteristics; length of body 8.5 mm. 



Variation. — Other specimens range in length from 8 to 10 mm. 

 In some, the sinuation before the hind angles is absent and the sides 

 are entirely, though weakly, arcuate; in others it is very distinct 

 and the sides are subparallel before the angles. 



Type.— USNM 69599. 



Type-locality. — Five miles north of Mabel, Linn County, Oreg. 



Specimens examined. — 181. 



Distribution (fig. 33). — Holotype male, allotype female, hills east 

 of the Willamette Valley 5 miles north of Mabel, T. 15 S, R. 1 W, 

 sec. 4, Willamette meridian, elev. 700 ft., Linn County, Oreg., Jan. 29, 

 1960, H. A. Hacker. Also the following paratypes: 13 males, 5 females, 

 same data as holotype; 2 males, 3 females, 2 miles north of Mabel, 

 T. 15 S, R. 1 W, sec. 28, elev. 900 ft.; 1 male, 4 females, 3 miles 

 southeast of Crawfordsville, T. 14 S, R. 1 W, sec. 29, elev. 600 ft. ; 

 6 males, 5 females, 2 miles south of Coberg, T. 17 S, R. 3 W, sec. 9, 

 elev. 400 ft. 



A few colonies of pumilus willamettensis still occur in the Willamette 

 Valley itself, but the subspecies is more common in the surrounding 

 foothills. It occurs in woods of Pseudotsuga menziesii (Mirb.) Franco 

 with some Quercus garryana Douglas or Tsuga heterophylla (Ref.) 

 Sargent and to an elevation of 900 feet. 



Remarks. — This subspecies has been confused with specimens of 

 inopinus and the northern form of infernalis in some collections. It 

 can be distinguished from the former by the frontal impressions and 

 from the latter by the punctate mesepisternum. Intermediates between 

 pumilus pumilus sensu stricto and pumilus willamettensis have been 

 collected from McMinnville, Yamhill County, in six localities in and 

 near the Eola Hills, Polk County, and two miles northwest of Tangent, 

 Linn County. These 43 specimens differ from pumilus willamettensis 

 in the following: sides of the pronotum more definitely sinuate; 

 tooth on median lobe longer and lobe reduced or absent on right 

 side; right paramere broader; elytral humeri more strongly dentate. 



4. Pterostichus (Leptoferonia) infernalis Hatch 



Figures 4, 34, 40 

 Pterostichus (Leptoferonia) infernalis Hatch, 1936, p. 704, 706; 1953, p. 112. 



Species description. — Same as description of inopinus group plus 

 the following. 



Head. — Frontal impressions sharply impressed, curved, forming an 

 angle of about 45°, divergent posteriorly; usually a faint triangular 

 depressed area on front; microstrigulose or microreticulate. 



