THE GROUND BEETLES. 137 



sides feebly curved, hind angles obtuse. Elytra oval, more than one-li;iir 

 wider than thorax, convex, faintly striate, the eighth stria entire: third 

 interval with three minute punctures. Length 2.:!-2.7 nun. 



Southern half of State; frequent. April 29 November 28. Oc- 

 curs beneath rubbish in dry open woodlands. 



Tribe IX. AXCIIOXODERIXI. 



Head oval or rounded, not prolonged or constricted to a narrow 

 neck ; antenna? slender. Thorax more or less eordiform, the side 

 margins distinct and with a bristle-bearing puncture on each side 

 in front of the middle, and another near the hind angle. Elytra 

 feebly margined at base, rounder] at apex, without dorsal punc- 

 tures in our species. Scutellum and scutellar stria distinct. Body 

 above pubescent. Hind coxa 1 contiguous. Two genera may occur 

 in Indiana, though representatives of but one have so far been 

 taken . 



KKV TO INDIANA C.KXKKV OK A N( 1 IOXODKKI X I. 



a. Antenna.' with four basal .joints glabrous. Thorax ovate, the second 



bristle-bearing puncture in front of the hind angle; last joint of palpi 



conical. KITIIORTICUS. 



'/(/. Antenna- \vith three basal joints glabrous. Thorax cordate, margin 



acute, the second puncture in the hind angle. XXXV. ATUANTS. 



Euphorticus jnilx.^crns Dej., Hack, shining and f> mm. in length. 

 ha.s been taken by Dury near Cincinnati and doubtless occurs in 

 the southern third of the State. 



XXXV. ATRAXUS Lee. 1848. (Gr.. "dull or indistinct.") 



This genus is represented in the United States by a single small 

 species having the thorax slightly broader than head; elytra mar- 

 gined at base, the tips rounded and surface striate. 

 2:: 1 ) (N4.1). ATUAXIS PUBESCI:NS Dej., Spec. III. 1827. 121'. 



Elongate, slender. Black or pit-eons; antenna?, mouth parts, legs and 

 abdomen pale reddish-brown. Thorax longer than wide, sides feebly curved, 

 hind angles and median impressed line distinct. Elytral stria 1 rather deep; 

 intervals convex, each with two or three irregular rows of minute punc- 

 tures, bearing fine yellow hairs. Length ti-7.5 mm. 



Vigo. Knox and Posey counties; scarce. April 10-October 20. 

 Occurs beneath cover in open sandy woodland. Resembles Plali)- 

 n us pusillus very much in form, but darker in color and with tin- 

 elytra rounded, not sinuate at tip. 



Tribe X. CTENODACTYLIXI. 



Antennae slender, base free, three basal joints glabrous, first 

 joint stouter, as long as the next two; joints three to 11, equal or 



