Ar 
104 . 
STENUS KIRBII. 
Order Coleoptera. Fam. Staphylinidas hat., Leach. 
Type of the Genus Stenus Juno Fayk. 
Stenus Lett., Fab., Fayk., Grav., Panz., Gy It. , Leach . — Psederus Oliv. 
Staphylinus Linn., Geoff., Marsh. 
Antennce not very remote, inserted close to the eyes, at the base 
of the clypeus, clavate, pilose, pubescent towards the apex, 
11 -jointed, 1st and 2nd joints robust, the former elongated, 
4 following slender, the 3rd joint the longest, the 6th and 7th of 
equal length, the latter more robust clavate, 8th subpyriform, re- 
mainder robust, 9th and 10th ovate, terminal joint conical (fig. 6). 
Labrum transverse ovate, pilose, slightly emarginate (1). 
Mandibles long, bent, acute, having a large tooth on the internal 
margin, below which they are serrated (2). 
Maxillae broad, bilobed, strongly ciliated, internal lobe the larger, 
external rather narrow. Palpi long 4?-jointed, basal joint very 
minute, 2nd long slender, 3rd longer, subfusiform, pilose, 4th 
long robust, pilose, subclavate truncate (3). 
Mentum subquadrate coriaceous, carinated in the centre, espe- 
cially anteriorly (4 a). Lip very long, retractile, subcoriaceous, 
with a dilated membrane extending half its length from the 
base (b), membranous and dilated at the apex, producing a lobe 
on each side and 2 small processes from the centre of the an- 
terior margin to which are attached the Palpi which are small 
and compressed 2-jointed, the terminal one being ovate and 
slightly pilose, the basal one slender, subclavate (c). 
Head large subtrigonate. Eyes large, sub globose. Thorax elongate 
subcylindric, ovate, truncated, narrower than the head. Scutellum 
very minute. Coleoptra quadrate, scarcely broader than the heady 
not covering half the body, posterior angles sinuated. Wings shorter 
than the Abdomen which is long , linear, convex, sometimes margined 
at others immarginate. Coccae very short. Thighs subfusiform. 
Tibiae and Tarsi slender, the latter 5-jointed , basal and terminal 
joints the longest, penultimate joint emarginate. Claws simple (5, a 
fore leg). , 
Kirbii Leach's MSS. 
Black shining, shagreened. Plead very large, thickly punctured, 
clothed with short aureous hair. Palpi ochraceous, fuscous at 
their apex. Antennae black, paler at the base. Eyes pale cine- 
reous. Thorax much narrower than the head, obovate, the 
surface uneven. Elytra not broader than the head, short, qua- 
drate, coarsely punctured, with a large ochraceous round spot 
on each below the middle. Abdomen margined, less coarsely 
punctured, clothed with aureous pubescence. Legs ochraceous 
slightly pubescent, apical half of the thighs, base and apex of 
tibise and tarsi, excepting the base of the 1st joint, fuscous. 
Beneath black, shining, punctured. 
In the Cabinets of the British Museum, Mr. Stevens, and the Author. 
