THE GROUND BEETLES. 95 



/■. l>asal impressions not or very sparsely punctured; elytra iri 

 descent, the stria^ tine; si/,«! larger. 14-16 unn. 



131. EBENINIS. 



ff. Basal impressions distinctly iiunctulate ; elyti-al stride deeper; 



smaller, not over 11.5 mm. 132. OAunrcAus. 



cc. Tliorax less narrowed behind, the angles small, rectansular, l)nt 



slightly prominent, impressions punctured. 



g. Smaller, not over 10 mm. ; form slender. 133. luctuosis. 



gg. Larger, 14-15 mm. : form broader. 134. cobvinis. 



lUl. Hind angles of thoi-ax not carinate, basal impressions single. 



h. Basal impressions wide and deep ; thorax strongly margined : 

 ligula obtusely carinate. 

 i. Size very large, 22 or more mm. ; surface but little polished, 

 female dull. 135. haldemanm. 



n. Size smaller, not over 20 mm. ; surface polished, shining. 

 j. Elytral strife deep, distinct to apex ; surface moderately 

 brilliant; size 16-20 mm. 136. tartabicus. 



■jj. Elytral striae fine, very faint towards apex; surface very 

 brilliant; size 15 mm. 1.37. scrutator. 



hli. Basal impressions linear; thorax finely margined; ligula not 

 carinate. 

 A-. Color purplish ; basal Impressions not punctured. 



138. purpuratus. 

 kk. Color black ; basal impressions punctured. 139. mutxts. 



cc. Dorsal punctures of elytra five or six, large, deeply impressed. 

 /. Hind angles of thorax small, dentiform ; elytra black, shining. 



140. PENNSYLVANICXTS. 



//. Hind angles obtuse ; elytra dark reddish-brown, feebly bronzed. 



141. LUCZOTII. 



129 (564). Pterostichus sayi Brulle., Silb., Rev. Entom., Ill, 277. 



Oblong, somewhat flattened. Bronzed or green above ; sometimes nearly 

 black ; basal third of antennsB reddish-brown. Thorax a little wider than 

 long, feebly narrowed behind, more so in front ; margins not depressed ; 

 basal impressions deep, punctate, the outer much the shorter ; hind angles 

 rectangular. Elytral stria:" deep, punctate. Length 10-12.5 mm. 



Throuorhont the State; common. IMarch 19-Oetoher 20. Prob- 

 ably hibernates. 



*130 (565). Pterostichus lucublandus Say. Trans. Amer. Phil. Soc. II. 

 1823. 55 ; ibid. I, 177 ; II, 478. 



Resembles the preceding but less flat and without the brilliant polish 

 of surface. Color exceedingly variable, usually green or bluish. Thorax 

 wider, not narrowed behind ; margin wider, more reflexed, depressed near 

 the hind angles. Elytral striae smooth, rarely finely punctate; intervals 

 subconvex, finely alutaceous. Length 10-14 mm. (Fig. 60.) 



Yqyy common throughout the State. February 21-September 

 22. Hibernates as imago. The dorsal punctures are usually four. 

 [7—234021 



