THE GROUND BEETLES. 95 



f. Basal Impressions not or very sparsely punctured ; elytra iri- 



descent, the strise fine ; size larger. 14^16 mm. 



131. EBENINUS. 



//. Basal impressions distinctly punctulate ; elytral strise deeper ; 

 smaller, not over 11.5 mm. 132. CAtDiCAus. 



ee. Thorax less narrowed behind, the angles small, rectangular, but 

 slightly prominent, impressions punctured. 



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

 gg. Larger, 14-15 mm. ; form broader. 134. coRviNtis. 



'W. Hind angles of thorax not earinate, basal impressions single. 



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

 ligula obtusely earinate. 

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

 female dull. 135. haldemani. 



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

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

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



ij. Elytral strise fine, very faint towards apex; surface very 

 brilliant; size 15 mm. 1.37. sceutatoe. 



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

 earinate. 

 7.-. Color purplish ; basal impressions not punctured. 



138. PtJEPTJEATUS. 



TcTc. Color black ; basal impressions punctured. 139. mutus. 



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

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



140. PENNSTLVANICUS. 



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



141. LUCZOTII. 



129 (564). Pteeostichus sati Brulle., Silb., Rev. Entom., Ill, 2tT. 



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

 black ; basal third of antennse 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 strife deep, punctate. Length 10-12.5 mm. 



Throughout the State; common. March 19-October 20. Prob- 

 ably hibernates. 



*130 (565). Pteeostichus luctjbiandus 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 strise smooth, rarely finely punctate; intervals 

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



Very common throughout the State. February 21-September 

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

 [7—23402] 



