THE CKOUNl) BEETLES. 87 



(/(/. 'rtM-miiial joint of |.;il|pi sIcihUt. acute at tip, that ot (he labial jialpi 

 shorter than tho prtH-eding. 



I). Head with distinct eyes. >vXI. Trechus. 



bh. Head without eyes. XXII. Anopiithai.mus. 



XX. Patrobus Dej., 1825. 



Beetles of medium size, 10 or more mm. in lenjrth, having the 

 elytra elongate, not margined at base, their sides snhparallel. For 

 literature regarding this and the next genus see: 



77or;(.— "Synoptic Tables" in Trans. Amer. Ent. Soe., V, 1874. 

 130; also in Bull. Brook. Ent. Soe., V, 1882, 47, 48. 



Seven species are known from the United States, one of which 

 occurs in Indiana. 



*110 (472). I'ATROBCs LONGicoKNLS Say, Trans. Amer. 

 Phil. Soe. II. IS23, 40; ibid. II. 4G6. 

 Klougate-oval. Black above, piceous beneath ; antenna^ 

 reddish-brown, half as long as body; legs paler. Last 

 two joints of inaxillary palpi e^inal. Thorax convex, n 

 little broader than long; sides curved to behind middle, 

 thence sinuate to base; front transverse impression and 

 median impressed line deep, hind angFes i-ectangular : 

 basal impressions broad, deep, punctured. Elytral strise 

 dee]) and distinctly punctured; intervals convex on disk, 

 flattened on sides. Length 12-14 mm. (Fig. 55.) Kg- 55- (After Leng.) 



Throughout the State; common. January 1-December 25. Oc- 

 curs beneath stones and rubbish along streams, lakes, etc. ; hiber- 

 nates as imago. Most common in INIay. 



XXI. Trechus Clairv. 180«. (Gr.. "a runner.") 



Elytra o})long-oval, almost twice as long as wide ; front tibia? 

 slightly broader to tip, the emargination extending nearly to the 

 middle of the tibiti^; length les,s than 6 mm. Four species occur 

 in the northern and w^estern parts of North America, one of which 

 extends down into northern Indiana. 



117 (483). Trechlts chalybeus Dej., Spec. V, 1829, 17. 



Elongate-oval. Black or dark brown with a bluish gloss; antenme 

 and legs reddish-brown. Thorax subquadrate, one-third wider than long : 

 sides curvetl to behind middle, thence oblique to base; disk smooth, median 

 impressed line distinct, basal impressions deep, not ])unctate, hind angles 

 subrectaugular. Elytra oblong-oval, with four or five dorsal strite, the 

 outer two very faint; strife finely punctate. Tnnei' wings absent. Length 

 n mm. 



Steu])en County; rai^e. May 13. One specimen was taken from 

 benoatli loaves in low moist woods on tlic eastern edge of Clear Tjake. 



