Staphylinidce of Japan. 79 



teiiiiai and palpi yellow, the former with the 9th joint 

 rather larger than the 8th, the 10th much larger than the 

 9th. Head considerably narrower than the tliorax, its 

 pimctuation a little stronger than that of the other parts. 

 Thorax narrower than the elytra, very short, greatly con- 

 stricted behind the middle, transversely impressed just in 

 front of tlie base, finely channelled along the middle, the 

 disc on each side with a deep and very large impression ; 

 there are also two large punctures near the front margin 

 in the middle, and another larger puncture on each side. 

 Elytra broad, scarcely longer than the thorax, shining, very 

 finely punctured. Hind body scarcely visibly punctured. 

 Legs yellow. 



Three specimens, all (I think) females, found at Naga- 

 saki in the month of March. 



Sten^STHETUS, nov. gen. (Stenini.) 



Tarsi antici et intermedii quinque-, posteriores quadrl- 

 articulati. 



This interesting genus is intermediate in appearance 

 between Evasthetus and Stenus. 



Labrum horny. JMandiblcs long, slender and curved, 

 each one with a long pointed tooth in the middle. ISlaxil- 

 lary palpi with the 1st joint long and slender, geniculate 

 at its point of insertion; 2nd joint slightly longer than the 

 1st, a little thickened in the middle; 3rd joint longer than 

 2nd, distinctly dilated, elongate oval, Avith the base pro- 

 duced ; 4th joint extremely fine and minute. Paraglossfe 

 very elongate and linear; 1st joint of labial palpi concealed 

 in my preparation behind a projecting portion of the 

 mentum ; 2nd joint short and broad, oval ; 3rd joint very 

 minute, subulate. Antenna3 extremely slender, the two 

 apical joints stouter than the others. Thorax subcylindrlc, 

 very finely margined at the sides ; prosternum large, ante- 

 rior coxa; small, and but little exserted. Mesosternum 

 formins: a neck received into the thorax. IMiddle coxre 

 small, nearly contiguous. Hind coxa^ conical, but with 

 the base a little produced on the outside. Hind body 

 stout, cylindric, scarcely margined at the sides. Legs 

 very slender, anterior and middle tarsi five-jointed ; pos- 

 terior tarsi with four joints, the basal one very elongate 

 (showing with a microscopic examination no sign of con- 

 striction or division), the basal joint as long as the others 



