tin: GROUND beetles. 



01 



probably occur in the State, though but three of them have as yet 

 been taken. 



KEY TO SPECIES OF GROUP A. 



a. Elytra without a dorsal puncture. 



lj. Head of moderate size ; thorax longer than broad, the basal impres- 

 sions linear, single. 121. adoxus. 

 Tjh. Head very large; thorax quadrate, its basal impressions broad; hind 

 trochanters rounded at tip. eostratus. 

 aa. Elytra each with one dorsal puncture behind the middle on the third 

 interval. 



c. Basal impressions of thorax double or bistriate. 



(1. Hind angles rectangular, longer and prominent ; elytral stria? 

 punctulate. substriatus. 

 del. Hind angles subobtuse or very small ; elytral striae not punctu- 

 late. APALACHIUS 



cc. Basal impressions of thorax single. 



e. Hind angles of thorax rounded or obtuse ; larger, 10 mm. ; thorax 

 without an impressed line in front. 122. obsoletus. 



cc. Hind angles of thorax rectangular, prominent ; elytral strke 

 deep ; small, not over S mm. 123. honestus. 



121 (519). Pterostichus adoxus Say, Trans. Amer. Phil. Soc, II, 1823, 



46 ; ibid. II, 472. 



Elongate, rather slender. Black ; antenna? and palpi dark reddish- 

 brown; legs and abdomen piceous. Thorax widest in front of middle, 

 thence gradually narrowed to base ; sides excurved near hind angles, which 

 are rectangular and denticulate; basal lines deep. Elytral stria? not punc- 

 tured, intervals subconvex. Length 13-15 mm. 



Throughout the State ; frequent. April 18-October 6. Occurs 

 beneath logs and stones on the slopes of deep wooded ravines. 



122 (532). Pterostichus obsoletus Say, Trans. Amer. Phil. Soc. IV, 



1S34, 424; ibid. II, 537. 

 Elongate, slender, subconvex. Black or piceous, shining ; antenna? and 

 legs reddish-brown. Thorax orbicular, sides strongly rounded ; basal im- 

 pressions rounded, deep and small. Elytra a little wider than thorax, the 

 stria? punctured, indistinctly so on sides and apex. Length 9.5-10.5 mm. 



Described from Indiana; occurs throughout the State. March 

 21- August 22. Frequent in hilly regions beneath stones and old 

 logs. 



123 (539). Pterostichus honestus Say, Trans. Amer. 



Phil. Soc, II, 1S23. 51 ; ibid. II. 475. 

 Elongate-oval, subconvex. Black or piceous ; antenna? 

 and legs reddish-brown. Thorax scarcely longer than 

 wide, much narrowed behind the middle and sinuate on 

 sides ; basal impressions narrow and deep, with the space 

 between them coarsely and sparsely punctured. Elytra 

 more oval and convex than usual, much broader than 



iig. 5/. 



thorax, the strhe deep, not punctured. Length S mm. (After Leng). 

 (Fig. 57.) 



