COLEOPTERA OF SOUTHERN CALIFORNIA. 211 



The true S. pluripundatus is a very different thing, 

 separable from all our other species by the impunctate 

 elytral strise, and by the very numerous setae (15 or 

 more) of the intervals. 



Mr. Blanchard observes in litt. that the males of all 

 species of the genus known to him have two setae near 

 the anterior margin of the last ventral, which are lack- 

 ing in the females. 



6. Trechus pomonae, sp. no v. 



Very near T. ovipennis, from which it differs in its slightly more trans- 

 verse prothorax, longer elytra with distinct indication of humeral angle, 

 traces of striae excessively faint, two dorsal punctures — basal and apical — 

 and in the antennas, which are a trifle less stout. 



From T. barbarce it must differ in its more transverse thorax, distinct 

 frontal impressions, two dorsal punctures (instead of three), and smaller 

 size. 



Three examples seen from Pomona and Pasadena. 

 7. Pterostichus inermis, sp. nov. 



Moderately elongate; piceous black, shining; legs dark rufous or rufo- 

 piceous. Frontal io\ese distinct. Prothorax wider than long, widest at 

 about the apical third; sides rather narrowly margined, strongly arcuately 

 narrowed behind, not in the least sinuate before the hind angles, which 

 are obtuse and rounded; base three-fourths as wide as the apex, margined 

 at the sides; apex feebly emarginate, anterior angles not prominent, 

 rounded; basal impressions rather feeble, the outer entirely wanting. 

 Elytra scarcely wider than the thorax, parallel, sides feebly rounded; 

 humeri slightly dentate; striae fine, impunctate; scutellar strife shorty 

 joining the sutural stria. Legs moderate; front face of middle thighs 

 bisetigerous; first joint of hind tarsi with lateral groove. Prosternum 

 usually feebly margined at tip but somewhat variable. Last ventral with 

 two setas each side in both sexes. In the male the two middle setae are 

 much more widely separated from each other than from the lateral setae 

 while in the female the four are nearly equally spaced. 



Length, 10-12.5 mm. 



Three males and three females from the foot-hill 

 canons of the Sierras near Pomona; March, April, 

 September. 



