ENTOMOLOGICAL NEWS [Dec., '09 



New Aleocharinae (Staphylinidae, Col.) of the U. S. 



By A. FENYES, Pasadena, Cal. 

 i. Silusa deiisa Brnh., i, litt. spec. nov. 



Moderately depressed, parallel, with sparse, yellow pubescence. 



Head black, opaque; prothorax piceous brown, opaque; elytra red- 

 dish brown with a large triangular scutellar and still larger triangu- 

 lar external marginal area piceous brown, so that the ground color ap- 

 pears only on a narrow oblique semi-lunar vitta, reaching from hume- 

 rus to apical sutural angle, opaque abdomen piceous black, at apex 

 lighter, a little shining; antennae piceous, paler 'toward base; legs 

 pale dirty reddish. 



Antennae about as long as head and prothorax together, strongly 

 incrassate toward apex; joint 2 longer than 3 ; 4 small, transverse; 

 5-10 gradually wider, transverse, the penultimate joints almost twice 

 as wide as long; n about as long as 9 and 10 together, large, oval. 



Head transverse, very finely, not densely punctate ; eyes large, 

 prominent, longer than the tempora ; genae entirely margined. 



Prothorax a little wider than the head, transverse, about two-thirds 

 wider than long, sides and base rounded a little narrower in front than 

 behind ; hind angles obtuse, blunt ; moderately densely and finely punc- 

 tate. 



Elytra a little wider and a little longer than the prothorax, outer 

 hind angles strongly emarginate ; moderately, a little coarsely, quite 

 densely granulosely punctate. 



Abdomen parallel ; segments 3-6 transversely impressed at base ; at 

 base a little coarsely and more densely, at apex more finely and sparse- 

 ly punctate. 



In the male the 7 dorsal segment of the abdomen with a short cari- 

 nula in the middle before the apex ; 8 dorsal segment at apex truncate 

 emarginate, with sharp crenulations. 



Length, 2.6 mm. 



Pasadena, in California, under sycamore bark. 



2. Silusa opaca spec. nov. 



Rather robust, moderately convex, subparallel, inconspicuously pubes- 

 cent. 



Head black, opaque; prothorax and elytra piceous red, vaguely dark- 

 ly suffused, opaque ; abdomen piceous black, apical segmental margins 

 and apex vaguely piceous red, a little shining ; antennae piceous brown, 

 joints 1-3 and u reddish yellow; legs reddish yellow. 



Antennae about as long as head and prothorax together, moderately 

 incrassate toward apex; joints 2 and 3 subequal ; 4 moderately, 5-10 

 strongly transverse; n scarcely as long as 9 and 10 together, oval, 

 pointed. 



