468 



FAMILY XT. STAPHYLINIDiE. 



aa. Thorax very finely strigose, quite opaque. 



g. Dorsal segments of abdomen densely punctate; front tibia? obliquely 

 emarginate on the outer side ; length 1.7 mm. tetkacaeinatus. 

 gg. Dorsal segments smooth ; front tibiae slender, truncate at tip ; grooves 

 of thorax feeble ; length 1.5-1.8 mm. 907. exiguus. 



902 ( 2749). Oxytelus scelptes Grav., Mon. Col. Micr., 1806, 191. 

 Elongate, subdepressed. Piceous ; legs and base of antennae dull yel- 

 low. Head small, narrower than thorax, finely and densely punctate and 

 with a slight median groove on vertex. Thorax elliptical, angles all rounded ; 

 disk rather closely punctured and with three entire grooves, the sides some- 

 what concave. Elytra slightly wider and one-half longer than thorax, 

 rather coarsely and roughly punctate. Abdomen very finely and densely 

 punctate. Seventh ventral of male with two narrow, deep notches, the 

 median lobe broad, truncate. Length 3.5-4 mm. 



Marion County; scarce. April 14. 



0. rugosus Erichs.. occurs in Canada, Massachusetts and Penn- 

 sylvania, and probably in northern Indiana, 



903 (2752). Oxytelus pennsylvanices Er., Gen. Spec. Staph., 1840, 792. 

 Elongate, depressed. Dark reddish-brown to piceous, shining; elytra 



dull clay yellow; legs and basal joints of antenna; paler. Head slightly 

 narrower than thorax, finely and rather closely punctate, the vertex rugose ; 

 frontal margin broadly curved and elevated. Thorax three-fourths wider 

 than long, sides rounded into base; disk finely and rather sparsely punc- 

 tate, the median groove distinct, the two outer ones faint. Elytra slightly 

 wider and one-third longer than thorax, finely, sparsely and rugosely punc- 

 tate. Abdomen at base narrower than elytra, almost smooth. Male with 

 two slight tubercles on hind margin of seventh ventral and head wider and 

 more quadrate behind the eyes than in female. Length 3.5-4.5 mm. 



Marshall, Putnam and Clark counties; scarce. April 17- 

 June 24. 



904 (2755). Oxytelus insignites Grav., Mon. Col. Micr., 1806, 188. 

 Elongate, subdepressed. Black or piceous, shining; thorax dark red- 

 dish-brown; elytra and base of antenna? dull yellow; legs paler. Head of 

 male wider than thorax, quadrate, nearly smooth, strigose each side behind 

 the eyes ; of female, not as wide as thorax, rounded behind the eyes, sparse- 

 ly and finely punctate. Thorax truncate at apex, front angles almost rect- 

 angular, sides rounded into base; disk rather coarsely and sparsely punc- 

 tate, with three deep grooves, its sides concave. Elytra slightly wider and 

 distinctly longer than thorax, finely and rather closely punctate, and finely 

 longitudinally rugose. Abdomen minutely granulate, not punctate. Length 

 2.5-3 mm. 



Throughout the State; frequent. January 5-October 4. Oc- 

 curs in fungi, beneath bark and dead leaves. The mandibles of the 

 male are very long, slender and scythe-shaped, 



