78 



FAMILY II. OATCABIDJE. 



95 (417). Bembidium quadrimact; latum Linn., Syst. Nat., I, 1758, 416; 



Say, Ed. Lee. IL 501, 553. 



j 



Moderately elongate, slightly depressed. Head and thorax bronzed or 

 blackish-bronzed, shining; elytra brownish or black, with a triangular 

 subhumeral spot and a smaller one behind the middle, dull yellow ; an- 

 tennae piceous. the basal joints and legs dull yellow. Length 2. 7-8. 7 mm. 



Southern half of State ; scarce. April 11-December 27. Re- 

 sembles pedicellatum but is less convex and with punctures of ely- 

 tra, finer and more closely placed; elytra! spots more distinct. Hi- 

 bernates as imago. 



96 (407). Bembidicm affine Say, Trans. Amer. Phil. Soc, II, 1823. 86; 



ibid. II, 501. 



Slightly elongate, convex. Black or piceous, slightly bronzed, shining; 

 elytra with a small spot near humerus, a large, triangular submargin.il 

 one at middle, a small one one-fourth from apex and often the apex, dull 

 yellow-; antennae fuscous, the basal joints and legs dull yellow T . Thorax 

 slightly wider than long, sides curved in front, sinuate behind, hind angles 

 rectangular, very finely carinate. Elytra more than one-half wider than 

 thorax, striae distinctly punctate, the first and second only entire. Length 

 2.5-3.5 mm. 



Throughout the State; common.. February 20-November 8. 

 Hibernates as imago. 



B. muscicola Hayw., 2.5-3.2 mm. in length, has been taken in 

 Michigan and northern Illinois and should be found in the north- 

 ern third of Indiana. 



97 (410). Bembidium anguliferum Lee, Ann. Lyc. Nat. Hist., Y, 1S52, 185. 



Slightly elongate, convex. Black, feebly bronzed, shining ; elytra with 

 dull yellow markings as given in key; legs reddish-brown to piceous. 

 Thorax much narrower at base than apex; basal impressions deep, with 

 one stria ; sides curved in front, sinuate behind ; hind angles acute, cari- 

 nate. Elytra one-half wider than thorax, stride punctate, feebly impressed, 

 especially on sides; intervals nearly flat. Length 3.2-4 mm. 



Lake County ; rare. May 5. A species of northern range, ex- 

 tending across the continent. 



98 (414). Bembidium assimile Gyll., Ins. Suec, II, 1810, 26. 



Moderately robust. Black; elytra piceous or brownish with submar- 

 ginal spot and apex paler; antenna? fuscous, paler at base; legs dull yel- 

 low. Thorax narrower at base than apex, sides strongly curved in front, 

 distinctly sinuate behind ; hind angles rectangular, disk sparsely and 

 coarsely punctate at base and apex ; basal impressions deep, uni striate. 

 Elytra nearly twice as wide as thorax, coarsely punctate, the punctures 

 obsolete on apical half. Length 2-2.7 mm. 



Lake. Laporte and Vigo counties; scarce. May 5-October 21. 

 Our smallest species. The subopaque pale spot is ocellate, being 



