414 



FAMILY XI. STAPH YLINIDiE. 



798 (2460). Stenus callosus Erichs., Gen. Spec. Staph., 1840, 737. 

 Rather slender, subcylindrical. Black, shining; sparsely pubescent; 



palpi and legs dull yellow, the femora dusky at tips. Head slightly wider 

 than thorax, surface between the eyes flat, rather coarsely, closely and 

 irregularly punctate, the middle portion slightly convex and almost smooth. 

 Antennae one-half longer than width of head, reddish-yellow, the club 

 darker; third joint one-half longer than fourth. Thorax subcylindrical, 

 slightly longer than wide, densely and rather finely punctate, with a small, 

 fusiform smooth space at middle. Elytra at base a little wider than head, 

 the suture one-fifth longer than thorax, finely, evenly and densely punctate. 

 Abdomen distinctly narrower than elytra at base, gradually tapering to 

 apex, finely and rather sparsely punctate. Length 3-3.2 mm. 



Kosciusko County ; rare. June 24. The thorax is nearly of the 

 same width throughout. Probably occurs throughout the State. 



799 (2462). Stenus aeculus Erichs., Gen. Spec. Staph., 1840, 744. 

 Subcylindrical, rather slender. Black, shining, sparsely clothed with 



grayish hairs. Head a little wider than thorax, surface between the eyes 

 almost flat, rather coarsely, densely and evenly punctate. Antennae scarcely 

 longer than width of head, dull brownish-yellow, the club darker, third 

 joint one-half longer than fourth. Thorax widest just behind the middle, 

 rather coarsely, densely and unevenly punctate, the interspaces finely ru- 

 gose. Elytra at base as wide as head, suture very little longer than thorax, 

 surface densely, coarsely and deeply punctate. Abdomen distinctly nar- 

 rower than elytra, rather coarsely and closely punctate. Length 2.8-3.4 mm. 



Lake and Marion counties; scarce. May 24-May 30. 



800 (2463). Stenus punctatus Erichs., Gen. Spec. Staph., 1840, 744. 

 Subcylindrical, rather robust. Black, shining, rather thickly clothed 



with grayish hairs. Head slightly wider than thorax, surface between the 

 eyes feebly convex, without grooves, finely and densely punctate. Antennas 

 as long as width of head, joints two to six reddish-brown, the others darker, 

 the third one-third longer than fourth. Thorax about as wide as long, 

 widest at middle, finely and densely punctate. Elytra at base as wide as 

 head, suture one-third longer than thorax, surface convex, deeply, densely 

 and rather coarsely punctate. Abdomen much narrower at base than ely- 

 tra, very gradually tapering to apex, deeply, coarsely and evenly punctate. 

 Length 3-3.3 mm. 



Throughout the State ; frequent. May 12-Oetober 17. 



Subfamily IV. PAEDERINAE. 



Medium sized or small Staphylinids having the antennas widely 

 separated at base and inserted at the sides of the front, above the 

 base of the mandibles, under a more or less prominent ridge ; 

 maxillary palpi with the last joint usually very small and awl- 

 shaped ; head narrowed suddenly behind into a distinct neck ; front 

 coxae conical and prominent ; hind coxae also conical and contiguous. 



