84 Mr. David Sharp on the 



its form and sculpture and pubescence almost exactly as 

 in incanus, but the punctuation is denser. Elytra almost 

 shorter than the thorax, very closely but not ^ coarsely 

 punctured. Hind body just as in incanus, that is to say, 

 only indistinctly punctured, but distinctly pubescent, the 

 transverse depressions on the basal segments well marked. 

 Legs with the femora reddish at the base, otherwise much 

 infuscate but not quite black, formed as in incanus, the 

 posterior tarsi just a little more elongate. 



The male has on the underside the hind margin of the 

 7th ventral segment of the hind body emarginate ; the 

 6th, also emarginate at the extremity, depressed in front 

 of the emargination, the depressed part with conspicuous, 

 long, white pubescence. 



Tavo specimens found on Mitzuyama, Nagasaki. 



153. Stenusjaponicus, n. sp. (^S. opaco, Er. peraflfinis). 

 Niger, subopacus, dense punctatus, palpis fusco-testaceis, 

 basi testaceis, pedibus rufis, tibiis tarsisque infuscatis ; 

 fronte lata obsolete bisulcatcl, thorace subrotundato, ab- 

 domine densius punctato. Long. 1§ lin. 



This species has all the structural characters of ^S*. opacus, 

 Er. It is just a little larger, has the palpi and legs paler, 

 the legs rather longer and more slender, the tarsi with 

 just the structure of those of S. opacus (except for being 

 a little longer and more slender), that is to say, they have 

 the fourth joint distinctly bilobed, but with the lobes 

 excessively short and not divergent. 



The male has a broad but shalloAV notch at the extremity 

 of the ventral plate of the 7th segment of the hind body, 

 and the 6th segment has the hind margin a little emar- 

 ginate. The femora are not (or scarcely) thicker than in 

 the female. 



Abundant in the neighbourhood of Nagasaki. 



154. Stenus sexualis, n. sp. (Sec. I. A. Er.) Niger, 

 asneo-micans, palpis pedibusque flavis. Long. 1^ lin. 



_ Mas, antennis piceis, articulis duobus basalibus 

 nigris. 



Fem., antennis obscure testaceis, apice infuscatis. 



This little species is clearly the representative in Japan 



of our S. circularis. It is of the same size and form as 



that species, but it is brassy, and the legs are paler and 



more slender, the tarsi being much longer. The upper 



