NATURAL SCIENCES OF PHILADELPHIA. 381 



nat rounded and slightly prominent ; basal impressions broad, shallow, 

 strongly punctured 13. rupeetris. 



4 — 4-25 mm. Blackish, margins brownish, feet and first two joints of 

 antenna; yellow ; prothorax as in rupestris, from which this species differs 

 only by its darker color and more elongated form, and of which it seems to 

 me to be a race 14. pa ral 1 e lu s. 



3-75 mm. Smaller, pale testaceous, metasternum and small elytral cloud 

 dusky ; prothorax nearly as wide as long, narrowed behind ; sides obliquely 

 subsinuate behind the middle; hind angles rectangular, not at all rounded ; 

 basal impressions broad, sparsely and finely punctured 15. rivali s. 



3-75 mm. Less elongate than the others of this group ; black, prothorax, 

 elytra and feet testaceous ; antennas brown, witii first 2 joints pale ; prothorax 

 wider than long, more narrowed behind ; sides scarcely sinuate near the base, 

 hind angles obtuse, very slightly prominent ; basal impressions feeble, with 

 a few punctures ; eyes smaller and less prominent than usual. New Jersey 

 and Virginia, two specimens 16. n i g r i c e p s, n. sp. 



3 mm. More elongate, black or piceous ; antenna? and feet testaceous ; 

 the former sometimes brown, with two basal joints pale ; prothorax but little 

 wider than long, narrowed behind ; sides scarcely sinuate near the base ; 

 hind angles obtuse, slightly prominent ; basal impressions broad, sparsely 

 punctured; eyes large, prominent.. 17. tantillus. 



3 — 3-25 mm. Same form and color as the last, from which it differs only 

 hy the sides of the prothorax being distinctly subsinuate behind the middle 

 and the hind angles nearly rectangular, not rounded, and somewhat promi- 

 nent ; the basal impressions are larger and more punctured ; eyes large and 

 prominent; antennae brown, first two joints and feet testaceous. 



18. c al i f r n i c u s. 



3-25 mm. Same form as the two preceding, but differing by the prothorax, 

 the sides of which are obliquely rounded behind the middle, and the hind 

 angles obtuse and rounded ; basal impressions less deep, sparsely punctured : 

 feet testaceous ; antenna? dark piceous ; first two joints testaceous. 



19. n e g 1 e c t u s. 



b. Stria of elytra effaced, except the sutural one, which is deep ; body 

 rather stout and convex ; prothorax not narrowed behind ; sides subsinuate 

 behind the middle ; hind angles rectangular ; basal impressions very feeble. 



4-5 — 6-5 mm. Varies from testaceous to greenish black with a bronzed 

 reflection; first two joints of antennae and feet testaceous. Traces of a long 

 scutellar stria are apparent in some specimens of this species, which thus 

 differs from all the others in which the middle tarsi of the male are not 

 furnished with papilUe 20. n i t i d u s. 



C. 



This division contains but a single species of very elong.ite linear form, in 

 which the eyes are much smaller and less prominent than in any other known 

 to me ; ihe prothorax much longer than wide, somewhat narrowed behind, 

 broadly sinuate on the sides, which have the lateral bead much more 

 strongly marked than in the other species ; the basal impressions are long, 

 narrow, deep and punctured ; the hind angles rectangular ; the elytra at the 

 base are wider than the prothorax, very long and parallel, obliquely sinuate 

 and subtruncate at tip ; the stria? are deep, the scutellar is represented by a 

 large puncture, and the second stria has a dorsal puncture behind the middle. 

 The tibiie are more spinous than in the other species, and the whole appear- 

 ance of the insect is that of a small Pterostichus. The front tarsi of the male 

 are feebly dilated, the middle tarsi without papillae. 



.^(•5 ram. Black, margins brownish ; antennre brown ; first two joints and 

 feet testaceous yellow; prosternum channeled between the front coxae; 

 peduncle of meeothorax coarsely punctured 21. linearis. 



1868.] 



