THE GROUND BEETLES. 



53 



44 (204). Nebria pallipes Say. Trails. Amer. Phil. Soc, II, L823, Ts ; ibid. 

 II, 494. 



Elongate-oval. Black, shining; legs and antenna? pale yellow. Thorax 

 short, broad, much narrowed behind, margins rather wide, strongly re- 

 r'exed; hind angles obtuse; disk smooth with a deep median impressed 

 line. Elytra deeply striate, the striae finely punctured on the sides; inter- 

 vals convex, the third with five larger punctures on the outer side. Length 

 10-12 mm. 



Lawrence, Franklin and Vigo counties; scarce. April 15-July 

 11. Occurs beneath stones and rubbish close to running water. 

 Probably to be found sparingly throughout the State. 



Tribe VI. SCARITINI. 



Species variable in size, having the antennaj rising from under 

 a frontal plate ; head with one or two bristle-bearing punctures 

 above the eyes ; mandibles without a similar puncture on the outer 

 side; labrum short, emarginate or sinuate. Body pedunculate, scu- 

 tellum not visible. Elytra not, or rarely, slightly margined at 

 base; prosternum not prolonged behind the coxa3; front coxal cavi- 

 ties closed behind; hind coxae touching; legs stout, more or less 

 adapted to digging. The tribe is composed of six genera, all of 

 which are represented in Indiana. 



KEY TO GENERA OF SCARITINI. 



a. Species of large or medium size, 15 or more mm. in length; basal joint 

 of antenna? long ; mentum broad, concealing at the sides the base 

 of the inaxilke; one bristle-bearing puncture above the eye and one 

 at hind angles of thorax. 

 h. Form broad, size large ; hind angles of thorax distinct ; elytra with 

 humeral carina. IX. Pasimachus. 



hh. Form narrow, size medium; hind angles of thorax wanting; elytra 

 without humeral carina. X. Scarites. 



<i<i. Species of small size, less than 10 mm. in length: basal joint of an- 

 tennae short ; base of maxillae not covered by the mentum ; two 

 bristle-bearing punctures above each eye and two at hind angles of 

 thorax. 



c. Margin of elytra entire; mandibles flat and curved. 

 (1. Front tarsi slender in both sexes. 



e. Thorax globular or oval; terminal joint of male palpi dilated 



and excavated beneath. XI. Dyschirius. 



ee. Thorax more or less quadrate ; palpi similar in the sexes, not 

 dilated or excavate in male. XI L Cliyixa. 



(Id. Front tarsi dilated in both sexes. 



f . Head not striate ; mentum feebly emarginate. 



XIII. JlSPIDOGLOSSA. 



ff. Head with numerous fine striae or longitudinal grooves; mentum 

 deeply emarginate. XIV. Schizogenius. 



