310 Mr. D. Sharp's revision of the 



Batrisus politus, n. s. 



Rufo-sanguineus, laevigatus, nitidus, antennis crassi- 

 oribus ; prothorace impressione hastata discoidali ; abdo- 

 mine elongato, basi foveolis magnis, profundis. Long. 

 2f mm. 



Mas, pedibus intermediis femoribus in medio breviter 

 spinosis, tibiis intus ad apicem late emarginatis. 



This species, which is in many structural features 

 allied to the European B. formicarius, is readily dis- 

 tinguished by the polished shining and im punctate sur- 

 face ; the hind tibiae are without apical spurs ; the 2nd 

 and following joints of the antennae are remarkably thick, 

 each being much broader than long, the 9th and 10th 

 still rather broader, the terminal joint very thick, pointed 

 on one side. Head without any distinct impressions ; 

 the antennae very widely separated. Thorax with a 

 broad discoidal depression, which terminates behind by 

 meeting an angulate transverse impression. Hind body 

 with the 1st ventral segment with a very deep transverse 

 impression behind the suture, and a rather longer and 

 still deeper one on each side of it ; this segment is about 

 equal in length to the two following together ; 4th seg- 

 ment nearly twice as long as the 3rd. 



Three specimens were found with an ant at Chiuzenji, 

 Aug. 22nd, 1881 ; and single specimens were also found 

 at Hakone, Miyanoshita (in May, 1880), and Nishimura, 

 15th June, 1881, in old wood or dead trees. 



Batrisus concolor, n. s. 



Rufus, laevigatus, sat nitidus, antennis crassiusculis, 

 articulis 2 — 6 subquadratis ; prothorace fere mutico, 

 tantum obsolete canaliculate), ante basin foveolato ; ely- 

 tris absque stria discoidali, et ad humeros vix depressis ; 

 abdomine basi baud foveolato. Long. 2£ mm. 



Allied, in respect of the form of the head and the very 

 widely separated antennae, to B.politus, but very distinct 

 by the abdominal structure. Joints 9 and 10 of the 

 antennae are broader than the preceding, strongly trans- 

 verse ; terminal joint also very stout, acuminate. Head 

 almost without impressions. Elytra remarkably even, 

 with a sutural stria, which is minutely deepened at the 

 base, but can scarcely be said to be foveolate, without 



