410 FAMILY XT. STAPHYLINID^. 



Laporte, Floyd and Clark counties; scarce. May 6-October !). 

 The coarse, prostrate hairs often cause the elytra to appear sculp- 

 tured as in Division C. 



790 (2384). STENUS KGENI/S Erichs., Geii. Spec. Staph.. 1S4U, 698. 



Rather robust. Black, shining, thickly clothed with short, prostrate 

 yellowish hairs, which give the abdomen a brassy tinge; legs piceous. Head 

 twice as wide as long, surface between the eyes flat, densely and deeply 

 punctate. Antennae as long as width of head, third joint one-third longer 

 than fourth. Thorax short, robust, widest just before the middle, finely, 

 evenly and very densely punctured. Elytra at base slightly wider than 

 head, suture one-fifth longer than thorax ; deeply, rather coarsely and 

 densely punctate. Abdomen as wide at base as elytra, thence gradually 

 tapering to apex, finely punctate, the carinre with four cusps. Length li.s 

 3 inm. 



Throughout the State; common. February 23-November 8. 

 Hibernates beneath mullein leaves and rubbish. Easily distin- 

 guished by the short, robust form, dense, even punctuation, flat 

 vertex and yellow pubescence of abdomen. 



S. vinnulus Casey, and S. canaliculatus Gyll, are known from 

 Massachusetts and Michigan; 8. minor and S. pauper culus were 

 both described by Casey from Michigan. 



791 (2396). STENUS ARGUS Grav., Mon. Col. Micr., 1806, 231. 



Short, rather robust. Black, shining; sparsely clothed with short gray 

 pubescence ; legs piceous. Head twice as wide as long, surface between the 

 eyes flat, evenly and densely punctate and with a distinct longitudinal 

 carina. Antennae slightly longer than width of head, third joint one-third 

 longer than fourth. Thorax widest a little before the middle, very slightly 

 longer than wide, closely, rather coarsely and somewhat unevenly punctate. 

 Elytra at base slightly wider than head, sutural line one-fourth longer than 

 thorax ; coarsely, deeply and evenly punctate, the interspaces equal in width 

 to punctures. Abdomen finely and rather sparsely punctate. Length 2.5- 

 2.8 mm. 



Lake and Starke counties: scarce. May 19-June 17. Casey's 

 ageus and rigidus are said to be synonymous. 



792 (2401). STENUS JUVENCUS Casey, Rev. Sten., 1884, 123. 



Rather slender. Black, strongly shining, clothed with long, gray, pros- 

 trate hairs ; legs piceous, paler beneath. Head twice as wide as long, ver- 

 tex flat, finely and rather sparsely punctate and with a distinct longitudinal 

 elevation. Auteiuue piceous-browu, third joint nearly one-half longer than 

 fourth. Thorax widest at middle, slightly longer than wide, rather coarsely 

 and deeply punctate. Elytra at base slightly narrower than head, sutural 

 line one-fourth longer than thorax ; finely, rather sparsely and evenly punc- 

 tate. Abdomen at base as wide as elytra ; feebly tapering to apex, coarsely 

 and sparsely punctate. Length 2-2.2 mm. 



