Pselaphidce of Japan. 311 



trace of any other stria or basal foveae. Hind body 

 with 1st segment scarcely equal in length to the two 

 following together ; the 4th but little longer than the 

 3rd ; segments 2 — 4 obscurely punctulate ; the basal 

 one smooth, like the anterior parts. Hind tibial without 

 apical spur. 



A single specimen was found at Yokohama with a 

 black ant, April 2nd, 1880. It is probably a female. 



VI. 1st dorsal segment twice or nearly three times as long 

 as the 2nd; its side-piece only moderately broad, or 

 quite narrow ; land tibiae with elongate apical spur. 

 Male diameters on front of head very remarkable, 

 and frequently with great development of the basal 

 joint of the antenna. B. fis&ifrom, B. ornatus, B. 

 basicornis, B. rugicollis, B. ornatifrons, and B. 

 stipes. 



I have already stated that B. vestittis, placed in 

 Group III., approaches the species of this group in 

 many respects. 



Batrisus Jissifrons, n. s. 



Nigricans, elytris sanguineis, antennis pedibusque 

 runs, longius pubescens ; antennis sat validis ad apicem 

 longius pubescentibus ; prothorace impunctato, medio 

 canaliculato, utrinque breviter carinulato ad latus im- 

 presso ; elytris fere impunctatis ; tibiis posticis calcari 

 apicali elongate Long. 2| mm. 



Mas, antennis articulo basali elongato, crasso, angulo 

 interno parum producto, clypeo anterius in medio pro- 

 cessu triangulari latiore, tuberculis supra antennas, latis, 

 planis, productis, rude granulosis, capite inter eas pro- 

 funde depresso et anterius processu minuto parum con- 

 spicuo minuto ; trochanteribus intermediis apice libero, 

 curvato ; metasterno late impresso ; abdomine segmento 

 basali ventrali in medio plicato-elevato, plicula ad 

 apicem pubescente, segmento apicali medio lsevigato, 

 versus apicem bituberculato. 



A single male of this species was found in Higo in 

 1882 by a native collector ; it is closely allied to 

 B. ornatus, but is rather larger and broader and blacker 

 in colour ; the basal joint of the antennae of the male is 

 rather broader, but its produced angle is less prominent, 

 the flat antennal tubercles are broader and more coarsely 



