406 FAMILY XI. Sl'A I'll Y I.I XID.T:. 



////. Kl.vtr:il siitui-t> l(injj;er than tliorax. 

 //. Species M umi. or more in length. 



/. l/oni;itu(liiuil elevation l)et\veen tlic eyes iii(llstiiii-l or nearly 

 ohsolele ; h'ligth ."'. nnii. 

 j. 'I'liorax witli median ini|iression very feeble, extending 

 nearly liie entire length. viciNUS. 



jj. 'I'horax with median impression rednc«'d to a simple ero- 

 sion just behind the middle. inc.katus. 

 //. Longitudinal elevation distinct; head wider than elytra at 

 base ; length 3.3 mm. 785. scabiosus. 

 /(/(. Si>ecies less than 3 nun. in length. 



A-. Thorax widest distinctly before the nnddle. 



/. Legs black ; length 2.6-3 mm. inornatus. 



//. Legs fuscous ; length 2.5-2.7 mm. placidus. 



A/,-. Thorax widest at or behind the middle; length 2.4-2.6 mm. 



ERIENSIS. 



(III. .Minute species, length less than 2 mm. 



///. Transverse carin;Te of abdomen without cusps; length 1.7-1.9 mm. 



nanus. 



//////. Transverse carina' willi three cus[)s ; form nnich more slender; length 



1.7 nun. puMir.io. 



753 (2321). Stenus stkangulatus Casey, Rev. Sten., 1884, 39. 



Elongate, very slendei-. Bhick. shining, very sparsely and tinely pubes- 

 cent; antenna' piceous. paliii jialer; legs uniform dull reddish-brown. Head 

 nearly twice as wide as long; surface between the eyes deeply excavate, 

 Hnely and rather sparsely punctate, with two grooves and a median con- 

 vex ridge. Tliorax widest before the middle, slightly longer than wide, 

 coarsely and irregularly punctate, the median impression rather wide and 

 shallow, extending two-thirds the length of disk. Elytra at base two-thirds 

 the width of head ; coarsely and irregularly punctate. Abdomen long, feebly 

 tapering, coar.sely and sparsely imnctate. Length 3-;}.5 mm. 



I.ake County; rai-e. May 2. Known heretofore from New 

 York and Detroit. 



754 (2328). Stknis EKVinHopi s Melsh.. IM-oc. I'hil. .\cad. Nat. 8ci.. II. 



1844. 40. 



Rather robust. I'.lnc]<, siiining, sparsely clothed witli short, tine gray- 

 ish pul)e.scence ; antenna- piceous, palpi and legs piceous-brown. Head be- 

 tween the eyes distinctly excavate, coarsely, closely and evenly punctate, 

 the median ridge low and subobsolete. Antenn:e longer than width of head, 

 the third joint one-third longer than fourth. Thorax very robust, widest at 

 middle, coarsely, closely and unevenly inuictate and with a rather narrow 

 shallow impression extending from middle two-thirds to base. Elytra 

 slightly longer than thorax, coarsely, deeply and unevenly punctate. Al>- 

 donien at base narrower than elytra, thence feebly tapering Jo apex, coarse- 

 ly and ratlK-r closely piniclale at base, more finely toward'apex. Length 

 4-5 nun. 



