the StapIivlinidEe of Japan. 373 



sides rounded in front, considerably narrowed behind, coarsely, 

 extremely densely punctured, quite dull. Elytra short, but 

 distinctly longer than the thorax, very coarsely and densely 

 punctured, so that the surface appears to be granulate. Hind 

 body with the basal segments rather closely punctured, the 

 apical nearly impunctate. Legs rather short. Male with a fine 

 carina on the middle of the terminal and penultimate dorsal 

 plates. 



Nagasaki, in early spring. 



I have not been able to see the labial palpi in this and the 

 allied insects, all of which appear to be rare, and I cannot 

 say Avhether they are two-jointed or three-jointed ; if the latter 

 be the case, this insect would be placed in BolitocJiara ; but 

 I think it will prove to be more nearly allied to Silasa 

 (Stenusa) rubra. 



Silusa rorida^ n. sp. 



Rufo-nigra, opaca, densissime punctata, abdomino basi rnfo ; anteu- 

 nis fusco-testaceis, tarsis testaceis ; pube albida vestita, prajsertim 

 in capite densa. 



Long. 2| millim. 



Antennae rather short and slender, first joint infuscate 

 yellow, second and third paler, fourth to tentii fuscous, ter- 

 minal joint short, a little paler than the preceding, tenth 

 transverse. Head extremely densely punctured, quite dull. 

 Thorax a little narrower than the elytra, rather strongly 

 transverse, much narrowed behind, like the head excessively 

 densely punctate and quite dull. Elytra a good deal longer 

 than the thorax, quite dull, densely covered with finely rugose- 

 granular sculpture. Hind body very sparingly punctured, 

 shining. Legs nearly black, with the tarsi pale. 



Oyama j one specimen. 



Closely allied to B. rugosa, but smaller, darker in colour, 

 with more slender antennge and less coarse sculpture. 



Stiusa punctipenm'sj n. sp. 



Kufo-nigra, capite thoraceque densissime punctatis, opacis ; elytris 

 fortiter punctatis, subuitidis ; abdomine basi sanguiueo ; antennis 

 rufis, pedibus piceis. 



Long. 3 millim. 



Antennse rather short and slender, thicker externally. 

 Head much narrower than the thorax, extremely densely 

 punctured, quite dull. Thorax rather strongly transverse, 



Ann. & Mag. N. Hist. Ser. 6. Vol. ii. 2Q 



