Pselaphidce of Japan. 319 



except that at Fukushima a female as well as a male was 

 found ; this individual exhibits, however, no difference 

 from the corresponding sex of B. fragilis. 



Junsai, on old trees ; Miyanoshita, May, 1880 ; Fuku- 

 shima, 28th July, 1881. 



Batrisus similis, n. s. 



Eufescens, nitidus, evidenter pubescens, antennis pedi- 

 bus palpisque testaceis ; capite anterius fortiter punc- 

 tato, vertice bifoveolato, in medio subtiliter longius cari- 

 nato ; prothorace impunctato, dorso canaliculato, lateri- 

 bus longitudinaliter impressis ; elytris ad basin quadri- 

 foveolatis, stria discoidali elongata. Long. 2|- mm. 



Mas, abdomine segmento secundo dorsali in medio 

 brevissimo, fere nullo, segmento tertio fovea elongata, 

 transversa, profunda, margine posteriore in medio lamina 

 elevata, brevi ; segmento ultimo ventrali simplice ; tro- 

 chanteribus posterioribus setulosis. 



The hind margin of the basal dorsal segment in the 

 male of this species is furnished only with short, incon- 

 spicuous pallid setse ; when an individual is examined 

 exactly from behind, so as to look between the rings, it 

 is seen that a large cavity exists between the 1st and 

 2nd rings (as well as another between the 2nd and 3rd), 

 the 2nd ring being thrust as it were into the interior of 

 the body beneath the 1st ring. 



This is another species extremely closely allied to 

 B. fragilis ; I have seen only two examples, and from 

 these I infer that, in addition to the male characters, it 

 is distinguished from its allies by slightly larger size, by 

 the more conspicuous depression on the front of the head, 

 and by the evidently carinate vertex. Two males have 

 been found. 



Yokohama ; Oyama, 25th May, 1880. 



Batrisus pedator, n. s. 



Eufo-castaneus, evidenter pubescens, antennis palpis 

 pedibusque testaceis ; capite subobsolete punctato, ver- 

 tice bifoveolato ; prothorace parum elongato, globoso- 

 cordato, fere impunctato, dorso canaliculato, lateribus 

 longitudinaliter impressis ; elytris convexiusculis, obso- 

 lete punctatis, stria discoidali elongata. Long. 1| mm. 



