THE SHOHT-WINGED SCAVKNGEK BEETLES. 347 



voM'ov and less deeply grooved thorax and a more distinctly punc- 

 tured head than in Chitnlia bilohnta. 



649 (2003). Falaqeia dissecta Er., Gen. Spec. Staph., 1840, 49. 

 Stouter and a little shorter than cinyulata. Black or piceous, shining, 



sparsely clothed with short flue hairs; antennte and elytra often brownish; 

 legs brownish-yellow. Autennse not reaching middle of elytra. Thorax 

 wider than head and slightly wider than long, sides strongly rounded in 

 front, thence converging to base; disk finely and sparsely punctate and with 

 a deep median groove. Scutellum with two carinas at middle. Elytra one- 

 half wider and slightly longer than thorax, finely and sparsely punctate; 

 abdomen parallel, narrower than elytra, finely and closely punctate. Length 

 2-2.5 mm. 



Lake, Marion and Putnam counties ; scarce. March 26-Decem- 

 ber 7. Taken by sifting. The darker color and the two carinse of 

 scutellum readily distinguish this from cingulata. 



XI. Tachyusa Erichs. 1837. (Gr., "swift.") 



Slender-bodied forms having the antennsE long and slender; 

 middle coxte almost contiguous ; thorax narrower than elytra ; abdo- 

 men narrow, usually constricted at base and with the first three 

 dorsal segments deeply impressed at base, the impressions coarsely 

 sculptured and divided on the median line by a fine carina which 

 .joins the raised basal margin. 



KEY TO INDIANA SPECIES OF TACHYUSA. 



a. Abdomen highly polished, almost smooth ; larger, 3-3.5 mm. 



650. QKACILLIMA. 



aa. Abdomen alutaceous and pubescent, minutely and closely punctate; 

 smaller, not over 2.8 mm. 

 6. Thorax convex or feebly flattened ; abdomen wholly dark. 



651. AMEKICANA. 



&6. Thorax with a deep median groove ; abdomen pale at base. 



652. CAVICOLLIS. 



650 (2046). Tachyusa gkacillima Lee, N. Sp. N. Amer. Col., I, 1863, 29. 

 Elongate, slender. Blackish-piceous, shining; antennae and legs red- 

 dish-brown, tarsi yellow; basal segments of abdomen reddish. Antenna 

 reaching tips of elytra, the second and third joints elongate, sub-equal. 

 Thorax about as wide as long, scarcely wider than head; sides feebly 

 rounded in front, almost straight on basal half; disk finely and rather 

 densely punctate, in female often with a faint median impression. Elytra 

 one-half wider and two-thirds longer than thorax, rather coarsely, sparsely 

 and roughly punctate. Abdomen distinctly narrower at base than middle. 

 Length 3-3.5 mm. 



Starke and Lawrence counties ; scarce. June ■^June 16. Prob- 

 ably occurs sparingly along shores throughout the State. 



