Pselaphida>, of Japan. 299 



Tmesiphoeus. 



Tmesiphorus crassicornis, n. s. 



Major, sat elongatus, fere nudus, parum niticlus rufus, 

 antennis crassis, articulis 2 — 8 transversis, clava magna ; 

 prothorace densissime punctato, elytris abdomineque 

 parce obsolete punctatis, illis ad humeros late pro- 

 fundeque impressis ; niesosterno ecarinato. Long. 3 mm. 



The peculiar sculpture and the excessively abbre- 

 viated clothing (the latter appearing indeed, without 

 careful examination, to be entirely absent) render this 

 fine species very readily identified ; it has moreover the 

 eyes less coarsely facetted than the other Tmesiphori ; the 

 sculpture of the thorax is excessively dense, so that the 

 surface appears rugose and its punctuation less distinct 

 than usual ; the basal joint of the antennae is elongate, 

 about as long as the three following together. 



In the male the antennae are stouter than they are in 

 the female, and the club is excessively thick ; the 10th 

 joint has its outer part sliced off, and this is also the 

 case with the basal part of the following joint, and the 

 2nd and 3rd ventral segments are slightly depressed on 

 the middle. 



Mr. Lewis has found three specimens ; one male with 

 a black ant at Suwa Temple, Nagasaki, July 31st, 1871 ; 

 a second male, also with a black ant, at Shiba, in Tokio, 

 May 21st, 1880 ; and a female at Nanaye, S. Yezo. 



Tmesiphorus princeps, n. s. 



Major, elongatus, fusco-rufus, elytris rufis, crebrius 

 breviter pubescens, parum nitidus, antennis elongatis, 

 clava (feminae) praesertim elongata, prothorace densissime 

 sculpturato, opaco ; elytris abdomineque obsolete punc- 

 tatis, illis ad humeros depressis ; mesosterno ecarinato. 

 Long. 3^ mm. 



Judging from a single female, this is allied to T. 

 crassicornis, but is abundantly distinct ; the setiform 

 appendages on the 2nd and 3rd joints of the palpi are 

 remarkably elongate, and the subocular patches of 

 pubescence are greatly developed ; and the abdominal 

 carinae only reach the base of the 2nd segment instead 



