70 STAPHYLINID^. 



STENUS, Latreille. 



S. palposus, Zett., Ins. Lapp. 70, 6 ; S. argentellus, Thorns., Skand. 

 Ool. ii. 222 ; S. bupthalmus, Gyll., Ins. Suec. iv. 475, 111 {nee Grav.) ; 

 *S'. carhonarius, Er., Gen. et .Spec. Staph. 696, 11, Kraatz, Ins. 

 Deutsch. ii. 570, 10 {nee Gyll). Elongate, depressed, dull black, 

 rathei- thickly and coarsely pubescent ; head a little broader than 

 thorax, almost as broad as the elytra, rather strongly and thickly 

 punctured, with broad and shallow frontal furrows, the interval 

 between these being only slightly convex ; antennae short, black, with 

 a distinct three-jointed club, the last joint being short, oval and 

 acuminate ; thorax strongly oblong, slightly convex, gently rounded at 

 the sides, sparingly pubescent, thickly, strongly and subrugosely 

 punctured, with a short, more or less obsolete, central furrow ; elytra 

 subquadrate, about the length of the thorax, with thick silvery 

 pubescence, forming whitish bands or spots on the sides of the disc, a 

 noticeable spot being present near the apex of each ; shoulders rounded ; 

 hind body parallel, scarcely narrowed behind, with somewhat thick 

 silvery pubescence, rather finely and thickly punctui-ed, the five basal 

 segments being transversely impressed and bearing fovir longitudinal 

 keels ; underside and legs rather shiny black. L. 4-4| mm. 



Ireland : Lough Neagh distiict, between Toome and the mouth of 

 the Ballindei^ry River ; one specimen (Johnson and Halbert, Irish List, 

 p. 665) ; Co. Meath (Nicholson). The species is rare in Northern and 

 Central Europe, and in France, near running streams, mostly in moun- 

 tainous districts. The close ally of this species is *S'. hujithahinis, Grav. 

 et Brit. Coll. {nee Gyll.) ; it may be distinguished from this insect by 

 its larger size, difierent and stronger pubescence, shorter and stouter 

 antennae, and closer and deeper punctuation. It has since been taken 

 in some numbers on the shores of Lough Neagh. 



S. formicetorum, Mann., Bull. Mosc. 1893, p. 183. Of a leaden- 

 black colour, with the head, thorax, and elytra with deep foveolate 

 punctures, sparingly clothed with ashy pubescence ; hind body strongly, 

 but less closely, punctured, without side margins. Closely allied to 

 S. nigriUdus, Gyll., but much smaller, shorter, and with the punctures 

 on the thorax and elytra much larger. Antennae and palpi entirely 

 black, the former rather short, with the third joint very slightly longer 

 than the fourth ; head with eyes about one and a half times as broad as 

 the thorax, strongly and deeply punctured, with the foiehead broadly 

 and obsoletely bisulcate ; thorax half the breadth of the elytra, rounded 

 at the sides, even ; base and apex of about equal length ; elytra as long 

 as thorax, even ; hind body rather short, gradually and slightly narroAved 

 towards apex ; legs entirely black. Female with the sixth ventral 

 segment of the hind body rounded at apex ; male characters apparently 

 not known. L. 1^-2 mm. 



Ditchling, Sussex (H. C. DoUman), by sifting a faggot stack, 

 August 2, 1910. Recorded by him as British in the Ent, Rec 1911, 



