THE GROUND BEETLES. 



69 



<1d. Elytra with the fourth stria straight. 



/. Broad, slightly depressed ; thorax nearly twice as wide as long, 

 not wider at base than apex. 77. carinula. 



ff. Robust; thorax about one-half wider than long, wider at base 

 than apex. 78. punctatostkiatum. 



cc. Elytra without quadrate impressions ; two dorsal punctures on the 

 third interval. 



g. Thorax wider at base than apex, nearly twice as wide as long; 

 color bronzed, shining. eobusticolle. 

 gg. Thorax not wider at base than apex. 



h. Feebly convex ; elytral stride deeply punctate, the punctures not 

 greenish ; legs bronzed piceous. 79. coxendix. 



hh. More robust ; elytra less deeply striate, punctures greenish ; legs 

 pale brownish-yellow. 80. confusum. 



74 (421). Bembidium l^evigatum Say, Trans. Amer. Phil. Soc, II, 1823, 



84 ; ibid. II, 499, 550. 

 Robust, convex. Green or bronzed, shining; antennae fuscous, the basal 

 joints and legs dull yellow, the femora darker ; under surface nearly black. 

 Thorax subquadrate, more than one-half wider than long, sides broadly 

 curved from apex to behind middle, thence sinuate to base, margins re- 

 flexed; hind angles rectangular and carinate ; disk smooth, the basal im- 

 pressions broad and deep. Elytra less than one-half wider than thorax, 

 the striae coarsely punctured but not impressed. Length 5.5-7 mm. 



Southern half of the State; frequent in sandy localities. April 

 15-July 28. 



75 (313). Bembidium nitidum Kirby, Faun. Bor. Amer., IV, 1837, 55. 



Robust, slightly convex. Black or blackish-bronzed, strongly shining. 

 Thorax subquadrate, about one-half wider than long, distinctly wider at 

 base than apex ; basal impressions broad, bistriate ; hind angles rectan- 

 gular, finely carinate. Elytra slightly wider than thorax, finely striate- 

 punctate; the first, and sometimes the second striae entire, the others ab- 

 breviated behind; intervals flat. Length 5-6.5 mm. 



Taken in small numbers by Wolcott near Indiana Harbor, Lake 

 County. April 23 -May 13. A member of the boreal fauna. 



70 (308). Bembidium in.equale Say, Journ. Phil. Acad. 



Nat. Sci., Ill, 1823, 151 ; ibid. II, 97, 549. 



Bronzed, shining; antennae piceous, the basal joint pale 

 red; legs blackish-green, femora at base and tibiae more or 

 less dull yellow. Thorax with sides curved from apex to 

 behind middle, sinuate in front of hind angles, which are 

 subacute, not carinate; disk finely alutaceous, median line 

 deep, basal impressions small, deep. Elytra more than one- 

 half wider than thorax, alutaceous, deeply striate, the striae 

 punctured; intervals convex, the third to sixth more or 

 less sinuate or irregular. Length 4.7-5.5 mm. (Fig. 49.) Fig< 49< (Original.) 



Southern half of Slate ; frequent, April 12-Oct. 17. x 5 - 

 B, Hit ovale Oliv., coppery or greenish bronze in hue and 5-6.5 



