the Staphylinidse of Japan. 37U 



Tachinus ohesus. 

 I'acJiinus ohesus, Weise, Deutsche eut. Zeitschr. xxi. 1887, p. 92. 

 A unique female; Hagi {Eiller). Not found by Lewis. 



Tachinus japonicus, n. sp. 



Major, nigricans, nitidus ; antennarum basi et articulo ultimo, palpis 

 pedibusque testaceis ; protborace picescente, marginibus dilutiori- 

 bus ; elytris fuscescentibus, subrufis ; protborace fere impunc- 

 tato, evidenter striguloso, elytris parce sat fortiter punctatis. 



Long. 9-11 millim. 



Antenna with the four basal joints red, the terminal joint 

 also pale, the intermediates darker, the penultimate joints not 

 so long as broad. Thorax only excessively finely and 

 sparingly punctate, but with the fine reticulation dense and 

 evident. Hind body shining, moderately closely and dis- 

 tinctly punctate. 



In the male the terminal dorsal plate is slender, little pro- 

 duced m the middle, with the apex of this short broad lobe 

 emarginate ; the lateral angles form each a broad, extremely 

 short prominence ; the corresponding ventral plate is produced 

 into two very long lacinia^, which are not widely separated, 

 are curved downwards, and nearly contiguous at their apices • 

 the preceding ventral plate is very deeply and broadly emar- 

 ginate, with the sides of the emargination twisted so as to be 

 perjpendicular at the angles ; in front of the emargination the 

 surface is depressed, the posterior part of the depression being 

 broadly asperate. 



In the female the last dorsal plate is trilobed, the three lobes 

 being of one length and the middle one separated by a narrow 

 space from the lateral j the middle lobe is the broadest and is 

 obtuse behind, the lateral lobes are also obtuse ; the last ven- 

 tral plate is truncate in the middle behind, the margin of the 

 truncation being setulose ; each side of this middle lobe is 

 armed witji a short, slender, but truncate spine, and each 

 lateral angle is produced to form a longer truncate spine, 

 which does not, however, extend so far back as the inter- 

 mediate spine, this latter itself extending considerably less 

 backward than does the middle lobe. 



A distinct species, somewhat allied to T. humeralis, but the 

 individuals are larger, with very different punctuation, and 

 strongly marked distinctions exist in the sexual characters. 



The species is probably abundant in the northern parts of 



