86 



FAMILY II. CARABIDzE. 



Ill (440). Tachys coeruscus Lee. Ann. Lye. Nat. Hist., IV, 1848, 472. 



Rather slender, subdepressed. Uniform black to pieeous, rarely dark 

 reddish-yellow; antennse fuscous, the basal joints paler; legs pale yellow. 

 Thorax subquadrate, about one-half wider than long, as wide at base as 

 apex; sides curved in front, oblique near base; hind angles obtuse, not 

 carinate. Elytra each with a sutural and one to three feebly impressed 

 dorsal stria?, and with four to six long, pale, erect hairs near the tip. 

 Length 2.2-2.7 mm. 



Southern half of State ; frequent ; rare in the northern coun- 

 ties. April 18-October 17. The elytra are often more or less iri- 

 descent. The uniform dark color and pale legs, token in connec- 

 tion with the other characters, render its identification easy. 



115 (470). Tachys ephippiatus Say. Trans. Anier. Phil. Soc.. IV, 1834. 

 439 ; ibid. II, 553-. 



Elongate, slender, convex. Pale brownish or reddish-yellow, shining; 

 elytra with a large, common dark brown spot on middle and usually a 

 smaller indistinct one near the scutellum ; antennae and legs dull yellow. 

 Thorax subcordate. narrower at base than apex, widest before the middle; 

 sides curved in front, sinuate behind, hind angles rectangular. Elytra one- 

 half wider than thorax, dorsal stria? six. moderately deep, punctured. 

 Length 2.5-3.2 mm. 



Southern half of State; frequent, April 12-September 3. Oc- 

 curs on damp sandy spots along the margins of streams ; also taken 

 by sifting in early spring. 



Tribe V. POGONINI. 



Small or medium sized beetles, having the antenna? slender, aris- 

 ing from under a feeble frontal ridge, the first two joints glabrous; 

 labrum short, truncate or broadly emarginate ; mandibles feebly 

 curved, with a bristle-bearing puncture in the outer groove; last 

 joint of palpi not awl-shaped, the next to last not pubescent. 

 Thorax with a bristly hair on each side and at hind angles. Body 

 not pedunculate, scutellum distinct, Elytra more or less striate, 

 with dorsal punctures present. Hind coxae slightly separated by 

 the mesosternum. Front tarsi of males with two joints dilated and 

 covered beneath with small scales. 



Four genera represent the tribe in the United States, three of 

 which occur in Indiana. 



KEY TO INDIANA GENERA OF POGONINI. 



a. Terminal joint of palpi more or less cylindrical and obtuse at tip. that 

 of the labial palpi as long as the preceding; head more or less con- 

 stricted or transversely impressed behind the eyes. 



XX. Patrobus. 



