THE GROUND BEETLES. 131 



depressions narrow and shallow. Elytral striae fine, not punctured; in- 

 tervals flat Length 7.5-9.5 mm. (Fig. 78.) 



Throughout the northern part of the State; frequent. Not 

 taken south of Vigo Coimty. Hibernates. January 6-Novem- 

 ber 24. 



219 (802). Platyntjs excavatus Dej., Spec. Ill, 1827, 169. 



Elongate, rather slender. I'ioeous bronzed, shining; base of antenuje 

 and legs dull reddish-brown. Thorax about as long as wide, but slightly 

 narrowed behind, sides regularly rounded ; basal impressions narrow, deep, 

 punctured; hind angles obtusely rounded. Elytral striae fine, not or in- 

 distinctly punctured; intervals flat. Length 7-7.5 mm. 



Lake, Laporte, Marion, Putnam aAd Vigo counties; frequent. 

 April 4^0etober 17. Occurs on sand and gravel bars of lakes and 

 streams. The dorsal punctures are larger than in any of our spe- 

 cies except octopunctatus, the first near third stria, the other two 

 near second. 



220 (803). Platynds feebeus Hald., Proc. Phil. Acad. Nat. Sci., I, 299. 

 Elongate, slender. Head and thorax greenish-black; antennae piceous. 



Thorax oval, nearly as long as wide, sides rounded, hind angles obtuse. 

 Elytral striae deep and strongly punctured on basal half; more faint and 

 less distinctly punctured towards the apex. Length 7-7.5 mm. 



Marion, Lawrence, Knox and Posey counties; one specimen 

 from each. March 21-August 28. Occurs near water. 



221 (804). PiATTNUs basaijs Lee, Ann. Lye, IV, 1848, 227. 



Elongate, slender. Head and thorax blackish-bronzed; elytra bronzed 

 green, shining; antennae piceous, the basal joints and legs reddish-yellow. 

 Thorax a little longer than wide, narrowed toward the base, hind angles 

 rounded ; basal impressions small, deep, finely punctate. Elytral striae 

 rather deep ; intervals moderately convex. Length 7-7.5 mm. 



Vigo and Posey counties ; scarce. Hibernates. May 24-Decem- 

 ber 18. The dorsal punctures are small and the second and third 

 vary much in position, though LeConte says they are placed on the 

 second stria. Resembles extensicollis but the basal impressions of 

 thorax much shorter, rounded instead of elongate, the margin not 

 wider at base. 



*222 (805). PLATYNrs nutans Say, Trans. Amer. Phil. Soc., II, 1823, 52; 

 ibid. II, 470. 



Elongate, slender. Head and thorax bronzed green ; elytra blackish- 

 green or cupreous. Thorax oval, a little longer than wide, margin nar- 

 rowly reflexed, more strongly toward the hind angles, which are rounded ; 



