the Staphylinidai of Japan. 383 



species is quite different from any other I am acquainted 

 with. 



Tachinus sihiricus, n. sp. 



Niger, nitidus ; antennarum basi pedibusque Tufis ; thorace elytris- 

 (]uc subtiliter strigulosis, illo parce subtiliter, his crebrius et magis 

 fortiter, punctatis ; abdomine subtiliter fere dense punctate. 



Long. G millim. 



Antennse moderately long and stout, the four basal joints 

 red, the others darker, tenth about as long as broad. Thorax 

 scarcely at all picescent at the sides. 



This is similar to the common European species of Tachi- 

 nus, especially to T. paUijjes, but the individuals are only 

 about half the size of those of that species, so that the resem- 

 blance to T. laticollis is still greater : but from that species it 

 differs by the sexual characters, which, however, are suffi- 

 ciently similar to warrant the two species being really allied. 



In the male the middle lobe of the last dorsal plate is 

 divided by a rather deep narrow notch, and each outer angle 

 forms a rather stout, not very short tooth ; the last ventral 

 terminates in two rather long, slender, widely separated 

 lacinige, the space separating the laciniae being continued 

 backwards as a narrow excision ; external to the lacinia3 on 

 each side there is a long slender tooth ; the preceding plate 

 has a vei'y deep excision, the margin of wliich is broadly set 

 with asperities ; at the hind margin on each side of this 

 excision there is a slight additional cavity, also asperate, and 

 forming as it were an adjunct or continuation of the excision, 

 and outside of this the surface is a little plicate, elevated and 

 prolonged backwards ; in the female the last dorsal plate 

 ends in four long acuminate spines of about equal length, tlie 

 middle notch being quite narrow ; the last ventral is sex- 

 dentate, the external tooth on each side being rather long. 



This species is described from individuals found at Lake 

 Baikal, in Eastern Siberia ; a single female found by Mr. 

 Lewis at Chiuzenji, 22nd July, 1881, apparently agrees with 

 the Siberian individuals except in slight details ; but it would 

 be proper to examine Japanese individuals of the other sex 

 before positively coming to a decision on this point. 



Tachinus mimulus. 



Tachinus mirmilus, Sharp, Trans. Ent. Soc. Lond. 1874, p. 16. 



Only four or five individuals have been brought this time, 

 Nagasaki, Tokio, Nikko. 



