THE GROUND BEETLES. 125 



front and behind, the margin Hither strongly retlexed ; basal impressions 

 wide, deep, not punctured. Elytral stria? shallow, not punctured; intervals 

 Hat. alutaceous. Length 12-13 nnii. 



Lake and Posey counties ; rare. May 14- May 20. 



203 (709). PLATYNUS CINCTICOLLIS Say, Trans. Amer. Phil. Soc., II, 1823. 



52; ibid. II. 476. 



Elongate, slender. Pic-eons black. Thorax widest at middle, more 

 narrowed behind than in front, margins strongly reflexed near the hind 

 angles; Itasal impressions deep, not punctured. Elytral stria? not punc- 

 tured; intervals slightly convex. Length 9.5-11 mm. 



Throughout the State; eoiinnon. Hibernates. February 9- 

 October 29. 



204 (770). PLATYNTS KKFLEXVS Lee., Agass. Lake Sup., 1850, 205. 



Resembles cincticoUis in form. Distinguished readily by the lighter 

 colored antenna? and legs. Thorax longer, more narrowed behind; side 

 margins more strongly retlexed, as wide in front as to/wards the base; 

 front angles more prominent. Elytral stria- deeper; the intervals a little 

 more convex. Length 9.5-11 mm. 



Laporte, Lawrence and Owen counties; frequent beneath rocks 

 along streams, especially those within hut near the mouths of 

 caves. April 15-November 8. 



205 (9272). PLATYNTS PAKMARGINATVS Ham.. Can. Ent.. XXV. 1893, 305. 



Elongate, slender, subdepressed. Keddish-brown ; antenna?, legs and 

 margin of thorax lighter brown. Thorax about as wide as long, side mar- 

 gins wide, strongly retlexed their full length ; front angles prominent, ob- 

 tusely rounded, hind angles obtuse; basal impressions deep, finely and 

 sparsely punctate. Elytral stria? deep, not punctured; intervals subconvex. 

 the third with three or four punctures near the third stria and another 

 near the apex of the second stria. Length 8-10 mm. 



Crawford and Jackson counties ; scarce. Occurs beneath stones 

 in channels or shallow ravines on the slopes of high wooded hills. 

 May 16-September 24. 



GEOUP C. 



The species of this group are winged, brownish, bluish or 

 greenish in color, with base of antenme, legs and occasionally the 

 thorax, reddish-yellow. The thorax is longer than wide, the mar- 

 gin less strongly reflexed, hind angles obtuse or rectangular. Ely- 

 tra elongate, about twice as wide as thorax, scarcely sinuate near 

 apex, humeri broadly rounded, stria- deep but tine, the intervals 

 nearly flat, the third with three to seven punctures. 



