Psclaphidce of Japan. 303 



be necessary before satisfactory results can be hoped for. 

 The Japanese species do not fall satisfactorily into any 

 of the genera or subgenera already established, and as 

 it would be clearly, under the circumstances, unadvisable 

 to create more new names, I have grouped the species in 

 a preliminary manner so as to facilitate their study. 

 Unfortunately the individuals of the species at my 

 disposal are very few, the Batrisi in Japan, as elsewhere, 

 apparently occurring to the collector only occasionally, 

 and even then only in ones and twos. 



I. 1st dorsal segment of hind body but little longer than the 



2nd ; 1st, 2nd, and even 3rd segments ivith very 

 slightly raised, but true, lateral margins ; no spur at 

 extremity of hind tibia ; terminal joint of maxillary 

 palpi short. B. euplectiformis only. 



Batrisus euplectiformis, n. s. 



Minus convexus, evidenter pubescens, rufescens, ely- 

 tris sanguineis; antennis crassiusculis articulis tribus 

 ultimis conspicue latioribus ; vertice profunde lateque cur- 

 vatim impresso ; prothorace ante basin in medio canalicu- 

 lar, versus basin fortiter angustato, lateribus in medio 

 angulatis ; elytris subtiliter punctulatis, stria suturali 

 subtili, pliculaque discoidali valde abbreviata, humeris 

 minute angulatis ; abdomine segmento duobus basalibus 

 subaequalibus, segmentis 1 — 3 ad latera submarginatis. 

 Long. 2 mm. 



Mas, trochanteribus posterioribus subspinosis, seg- 

 mentis ventralibus in medio depressis. Fern, incog. 



This interesting species can be confounded with no 

 other, by reason of the abdominal structure and the 

 Euplectus- or Triclionyx-like form ; it has no trace of 

 a spur on the hind tibiae. 



A single individual only has been found on the bluff at 

 Yokohama, May, 1880. 



II. 1st dorsal segment only about twice as long as the 2nd ; 



side-piece of 1st segment very narrow, so as to form 

 nearly or quite a lateral margin ; such may also be 

 distinguished, though very obscure, on the 2nd segment. 

 Hind tibia without apical spur (or with only the rudi- 

 ment thereof). Maxillary palpi rather elongate. 

 B. spinicollis, B. longicornis, and B. angustus. 



