THE GROUND BEETLES. 



75 



mi. Thorax cordate, the base truncate. 



/>. Thorax slightly wider than long, distinctly narrower at 

 base than apex ; elytra black, slightly bronzed, with 

 dull yellow markings along the margin. 1)6. AKFINK. 



/>/>. Thorax one-half wider than long, but slightly narrower at 

 base than apex; elytra piceous or nearly black, with- 

 out pale spots on margins. MUSCICOLA. 

 Frontal strut' very oblique, strongly convergent, the outer one 

 the shorter and often very faint; thorax cordate, truncate 

 at base. 



<[. Thorax distinctly wider than long, the hind angles acute; 

 elytra black, scarcely bronzed, with submarginal spot and 

 apex more or less dull yellow; larger, 3.2-4 mm. 



'/'/. Thorax scarcely wider than long, the hind angles rectangu- 

 lar; elytra brownish-bronzed with subapical spot and 

 apex pale; smaller, 2-2.7 mm. 9S. ASSIMILK. 



//. Frontal stria- nearly straight, the outer one entire; elytra black 

 or greenish-black, shining, with a submarginal spot aud apex 

 dull yellow; length 3.2-3.5 mm. SULCATUM. 



>>li. Dorsal punctures of elytra in irregular rows on all the intervals, 

 each puncture bearing a distinct, bristle-like hair; all the stria- 

 abbreviated behind the middle. It 1 .), si-: MISTRIATUM. 

 <ia. Eyes small, flattened; outer lobe of maxilhe with the two joints united; 

 color uniform reddish-brown. OULONGULUM. 



x7 (366). BEMBIDICM CORDATIM Lee., Ann. Lye. Nat. Hist., IV, 184S, 457. 

 Moderately elongate, depressed. Head and thorax coppery or greenish- 

 bronzed, alutaceous; elytra dull brownish-yellow, with a humeral spot, a 

 small oblong spot on third interval and two cross-bands connected by a 

 sutural line, bronzed or nearly black. Thorax with sides strongly curved, 

 sinuate near base; hind angles rectangular, finely carinate; basal impres- 

 sions rather deep, bistriate. the outer stria very feeble. Elytra one-third 

 wider than thorax, stria- finely punctate to behind the middle; intervals 

 fiat. Length 5.5-6.2 mm. 



Vigo County; rare. June 19- July 3. 



xx i3xx). P.EMr.inu M ix r i K:;MKI>H\M Kirby, Faun. P>:ir. 



Amer., IV, 1X37. 5X. 



Elongate, slightly depressed. I>ark greenish-bronzed ; 

 elytra with the apex, a small subapical spot near the 

 margin and rarely a short cross-band in front of middle, 

 dull brownish-yellow: antenna- fuscous, the basal joints 

 paler. Head and thorax alutaceous, the latter with sides 

 curved to behind middle, thence oblique to bast-; hind 

 angles obtuse, carinate: basal impressions small, rather 

 deep, bistriate. Elytra one-third wider than thorax, the 

 stri.t' finely punctured to behind the middle; intervals 

 fiat. Length 3.7-4.5 mm. (Fig. 50.) 



Fig. 50. 



(Original.) X 6. 



