130 



FAMILY IT. — CAKABIDJE. 



214 ( 790). Platynus atratus Lec.. Agass. Lake Sup.. 1S50. 205. 



Elongate-oval, rather slender. Black, shining; apical portion of an- 

 tenna? and tarsi piceous. Thorax snbrotund, a little wider than long, the 

 reflexed margin but little wider toward the base; basal impressions deep 

 with a small tubercle. Elytra but little wider than thorax, the stria? very 

 finely or obsolete]? punctate; intervals distinctly convex. Length 8-9 mm. 



Steuben. Laporte and Kosciusko counties; frequent, August 

 M- August 28. A member of the boreal fauna. 



*215 (791). PiATYxrs melaxarius Dej.. Spec. III. 1S27. 152. 



Elongate-oval, rather broad. Black, shining: tibia?, tarsi and basal 

 joint of antennae dark reddish-brown. Thorax subrotund, as wide as long, 

 the margin wider and more strongly reflexed toward the base ; depressions 

 large, with a distinct rugosity or tubercle near the angle. Elytra distinctly 

 wider than thorax, the striae of moderate depth, finely punctate. Length 

 S. 5-9.5 mm. 



Throughout the State; common. Hibernates. January 1- 

 October 12. 



216 (794). Platynus affixis Kirby, Fauna Bor. Amer.. IV, 1S37. 27. 

 Elongate-oval, rather broad. Black or piceous, shining. Thorax sub- 

 rotund, a little wider than long, side margins narrow, scarcely reflexed 

 toward the hind angles, which are obtuse: depressions wide, shallow and 

 without a tubercle. Elytra one-half wider than thorax, stria? shallow, not 

 punctured, the fifth usually with a dilated shallow impression near the 

 apex; intervals flat. Length S.5-9.5 mm. 



Lake. Starke and Kosciusko counties ; scarce. Occurs along The 

 sandy beaches of lakes. April 9-October 24. 



P. carlo Lee. length 8-9 mm., was described from Lake Su- 

 perior and may possibly occur in northern Indiana. 



217 (796). Platyxi s corvus Lee. Proc. Phil. Acad. Nat. ScL, 1S60. 319. 

 Elongate-oval; rather broad. Piceous black, shining. Thorax slightly 



broader than long, sides rounded into base ; margins rather broad, narrowly 

 retlexed; basal depressions wide, shallow, without a trace of tubercles. 

 Elytra oblong, much wider than thorax ; strke rather deep, not punctured : 

 intervals slightly convex, alutaceous. Length 9.5 mm. 



Laporte and Kosciusko counties ■ rare. October 21-October 22. 

 Taken beneatli rubbish along the beach of lakes. Our only species 

 having all three dorsal punctures on third stria. A member of the 

 boreal fauna. 



218 (800). Platyxus cupripexxis Say, Trans. Amer. Phil. Soc. II. 1823. 



50; ibid. II. 474. 



Elongate, rather broad. Green, strongly polished; disk of elytra cu- 

 preous; under surface blackish-bronzed. Thorax longer than wide, the 



