Staphylinidce of Japan. 69 



as long as broad ; mandibles reddish. Palpi yellow. 

 Head broad and short, the part in front of the eyes being 

 short, convex behind, the hinder angles entirely rounded, 

 shining ]>itchy black, coarsely, closely and regularly punc- 

 tured. Thorax intermediate in width between the head 

 and elytra, rounded at the sides, and narrowed both in 

 front and behind ; it is longer than broad, it is shining 

 pitchy black, coarsely and moderately closely punctiu-ed, 

 the punctures at the base coarser and not so close ; with a 

 slight elevation in the middle in front of the scutellum, 

 and an obscure impression on each side of it (as in 

 Scopcuus). Elytra abbreviated, narrowed at the shoulders, 

 shorter than the thorax, coarsely and closely punctured. 

 Hind body dilated in the middle, closely punctured, the 

 punctuation of the basal segments rather coarse, of the 

 apical ones fine, the basal segments sometimes pitchy red. 

 Legs pale yellow. 



The male has a small notch in the middle of the hind 

 margin of the 7th ventral segment of the hind body. 



Four specimens ; luider dead leaves. Maiyasama, 

 Hiogo, July, 1871. 



Xeognathus, nov. gen. (juxta Sunium locandus). 



Labrum medio anguste excisum utrinque vix den- 

 tatum. 



Caput collo tenuissimo. Prothorax medio angulatus, 

 antrorsum abrupte angustatus. 



Antennas tenuissima^, rectre. 



Tarsi posteriores articulo primo elongate, 4° bilobo. 



This interesting genus is readily distinguished fron\ 

 Sunius by the form of its head and thorax. Labrum with 

 a small notch, and apparently Avithout tooth, but on 

 examination, Avitli the microscope, it is found that the 

 notch is bounded on each side by a minute double tooth, 

 the external portion of which is more prominent than the 

 internal. Maxillary palpi elongate, 3rd joint slender, and 

 not much incrassate. Mandibles extremely slender ; from 

 below the middle of each proceeds a long slender curved 

 tooth, this tooth furnished with two small sharp teeth on 

 the inner side near its base. Eyes rather large and pro- 

 minent. Base of the head entirely rounded, furnished 

 with an extremely narrow neck, which however is liable 

 to be thought larger than it really is, OAving to its being 

 encased by a supplementary piece attached to the anterior 



