Pselaphidce of Japan. 315 



very conspicuous. Elytra narrow in front, curved at the 

 sides, convex, the discoidal plicula excessively short ; 

 shoulders without trace of prominent angle. 1st dorsal 

 segment rather elongate, its curved lateral plica mode- 

 rately distant from the side ; 2nd segment fully one-third 

 the length of the 1st. Hind tibiae with rather long 

 apical spur. 



Only a single individual has been found ; though the 

 head is simple in front, it is possibly a male, as the 

 intermediate femora are armed at a little distance from 

 the base with a rather long spine. 



Kiga, May, 1880. 



Batrisus gracilis, n. s. 



Gracilis, rufo-castaneus, nitidus, parcius sed longius 

 pubescens ; antennis subgracilibus, articulo ultimo elon- 

 gato, acuminato, basali crasso et longo, sequentibus 

 longitudine aequali ; prothorace ante basin foveolato, 

 dorso canaliculato, lateribus longitudinaliter impressis ; 

 abdomine segmento dorsali sat elongato, medio utrinque 

 plicula elevata brevi. Long. 2| mm. 



Of this insect only a single specimen is present ; it is 

 no doubt a male, and is closely allied to B. solitarius, 

 but is rather more slender, and with the pubescence 

 rather longer and more scanty. The basal joint of the 

 antennae is much longer, and the apical joint is armed 

 at the base internally with a slender projection ; the 

 thorax is evidently channelled on the disc ; the pliculae 

 on the basal dorsal segment are less distant, and the 

 surface between them is more depressed, the apical spur 

 of the hind tibiae is more elongate, and the middle 

 femora are armed near their middle with a very long 

 spine. 



Miyanoshita, May, 1880. 



VIII. Eyes large, placed at the back of the head, not in the 

 middle of the sides, as in all the other groups ; 1st 

 dorsal segment very elongate, about six times as long 

 as the very short second ring. No spur on hind 

 tibia. B. dissimilis, B. puncticollis, B. fragilis, 

 B. japonicus, B. fallax, B. similis, B. pedator, 

 B. modestiis, B. antennatus, B. optatus. 



