THE GROUND BEETLES. 



83 



105 (466). Tachys dolosus Lee, Ann. Lyc. Nat. Hist., IV, 1848, 470. 

 Very elongate, slightly convex. Brownish-yellow or pale reddish-brown. 



shining; antenna? and legs paler. Thorax quadrate, about one-half wider 

 than long, slightly wider at base than apex ; basal impressions small, mod- 

 erately deep; hind angles rectangular, finely carinate. Elytra elongate, 

 nearly one-half wider than thorax, with a deep sutural stria which does 

 not reach the base. Length 2.2-2.7 mm. 



Lake County; rare. May 21- June 26. A few specimens taken 

 from beneath cover in sandy places near Pine and Clark Junction. 



106 (456). Tachys xanthopus Dej., Spec. V, 1831, 60. 



Robust, convex. Piceous or nearly black, shining, the elytra indis- 

 tinctly paler at tip ; antennae piceous, the basal joints and legs dull yellow. 

 Thorax nearly twice as wide as long, sides strongly curved in front, oblique 

 behind ; basal impressions broad, deep ; hind angles subobtuse, not cari- 

 nate. Length 1.7-2.2 mm. 



Throughout the State; frequent. April 22-October 17. Often 

 found running about on mud flats in the daytime. 



107 (453). Tachys tripunctatus Say, Trans. Amer. Phil. Soc, IV, 1834, 



439 ; ibid. II, 553. 

 Rather elongate, subdepressed. Brown or piceous, shining, the elytra 

 slightly paler at the sides ; antennae fuscous, the basal joints paler ; legs 

 dull yellow. Thorax subquadrate, one-half wider than long ; sides rounded 

 in front, slightly sinuate near base ; hind angles rectangular, with a short, 

 fine carina. Elytra with a sutural and three or four abbreviated dorsal 

 stria?, the inner three deep, the first only entire. Length 2.7-3.2 mm. 



Perry County ; rare. May 16. Described from Posey County. 



108 (454). Tachys vivax Lee, Ann. Lyc. Nat. Hist., IV, 1848, 468. 

 Rather robust, convex. Reddish-brown, rarely rufo-piceous, shining, 



the elytra paler at sides and tip; antennas and legs pale yellow. Thorax 

 more than one-half wider than long ; sides rounded in front, feebly sinuate 

 behind ; hind angles rectangular with a short fine carina. Elytra with three 

 or four inner strife distinct, the inner two deeper. Length 2.2-2.7 mm. 



Throughout the State ; scarce. April 17-September 9. 



109 (455). Tachys capax Lee, N. Sp. N. Am. Col., I, 1863, 20. 



Rather elongate, convex. Black, very shining; antenna? dark fuscous, 

 paler at base. Thorax one-half wider than long, wider at base than apex, 

 basal impressions broad, deep ; sides strongly rounded to behind the middle, 

 sinuate for a short distance in front of hind angles, which are rectangular 

 and finely carinate. Elytra oblong-oval, less than one-half wider than 

 thorax, the two inner striae deep, the third feebly marked. Length 2.3-3 mm. 



Knox and Fayette counties; rare. April 25-June 25. A spe^ 

 cies of southern range, taken from the edge of cypress swam]-), 



