TUB GROUND BEETLKS. 87 



(Ki. TermiuMl .joint of ]);iljii sleuder. iicute iit tiii, tbat of Uio liibial palpi 

 shorter than the preoediiig. 



b. Head with distinct eyes. KXI. Trechis. 



Ith. Head without eyes. XXII. .iNOPHTHALMi-.s. 



XX. Patrobus Dej., 1825. 



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

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

 literature regarding this and the next genus see: 



Ho/-y/.— "Synoptic Tables" in Trans. Amer. Ent. Soc, V, 1874, 

 130 ; also ill. Bull. Brook. Eut. Soc., V, 1882, 47, 48. 



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

 occurs in Indiana. 



*11(5 (472). I'ATROBr.'s i-o.xuieOKMS Say. Trans. Aiiier. 

 Phil. Soc. II, 1,S2;!, 40; ibid. II, 400. 

 Elongate-oval. Black a)](jve, piceous beneath ; antenna- 

 reddi.sh4}r(]wn. half as lonj; as body; legs jialer. Last 

 two .joints of maxillary palpi eiiual. Thorax ((invex, a 

 little broader than Ions; sides curved to behind middle, 

 thence sinuate to base; front transverse impression and 

 median impressed line deep, hind angles rectangular ; 

 basal impressions broad, deep, i>unetured. Elytral stria- 

 deep and distinctly pimctured ; intervals convex on dislv, 

 flattened on sides. Length 12-14 mm. (Fi.tf. .Vi.) Fig. 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. Host common in ifay. 



XXI. Trechus Clairv. ISOfi. (Gr.. "a runner.") 



Elytra oblong-oval, almost twice as long as wide; front tibiiv 

 slightly broader to tip, the emnrgination extending nearly to the 

 middle of the tibi;v ; length less than 6 mm. Four species oecui- 

 in the northern and western parts of North America, one of which 

 extends down into northern Indiana. 



117 (4S:!i. TjiKciirs ciiai.ibei s I>''.i.. Spec. V. 1S21I, 17. 



Elon.i^ate-uval. Klaclc or dark l)ro\vn with a bluish gloss; antenmc 

 and legs reddish-lirown. Thorax sulMpiadrate. one-third wider than long; 

 sides eurve<I to behind middle, tlieucc oblique to base; di.sk smooth, median 

 impressed line distinct, basal imiiressious dee]i, not ]iunctate, hind an.^jles 

 sul>i-ectangular. Elytra oblong-oval, with f<iur or five dorsal stria-, the 

 outer tuo YC\'y faint: stria- I1ih4.\' punctale. Iiinei' wiu.gs absent. Leugtli 

 .5 mm. 



Sti'ubcii County; rare. Afay l:i. One specimen was tak'en froii 

 ])ciieath leaves in low moist woods on the eastei-n ed.^o of Clear Lake 



