J/5 
f-/vsc4 
228 . 
SYNTOMIUM NIGROyENEUM. 
Order Coleoptera. Fam. Staphylinidae Lat Leaclu 
Type of the Genus Syntomium nigroaeneum Nob . 
Syntomium Nob. Evaesthetus Kirby ? 
Antennae inserted before the eyes at the base of the mandibles,, 
longer than the head, clavate pilose, 11 -jointed, 1st and 2nd 
joints nearly of equal size, robust ovate, 3rd as long but slender, 
the 5 following moniliform, the remainder forming a more robust 
mass, the 9th and 10th cup-shaped, the 11th ovate, with a 
transparent vesicle at the apex (6). 
Labrum somewhat bilobed, corneous, membranous at the margin 
and producing a few bristles at the middle (1). 
Mandibles slightly bent, acute, producing a membranous ciliated 
margin internally (2). 
Maxillae rather long and slender, terminated by a long articulated 
lobe, coriaceous at the base, membranous and pubescent at the 
apex, with a similar lobe on the inside. Palpi short 4-jointed, 
basal joint very minute, 2nd obtrigonate, 3rd robust oblong, 4th 
pear-shaped (3). 
Mentum quadrate. Labium somewhat cordiform, membranous 
and ciliated, producing 2 short spines in the centre. Palpi 
arising near the base, short and rather robust, nearly filiform, 
triarticulate, terminal joint the smallest (4). 
Head subtrigonate, the Eyes remote and inserted at the base. Thorax 
broader than the head, transverse ovate. Scutellum none. Elytra 
transverse- quadrate, covering only the base of the abdomen. Wings 
very delicate and ample , twice as long as the body. Abdomen as 
broad as the elytra , conical , depressed , the sides r flexed. Legs small 
and slender , anterior rather the shortest. Tibiae simple. Tarsi very 
pilose , 5- jointed , the 5th joint as long as the first 4, which are very 
short. Claws bent and acute (5, a fore leg). 
Nigroaeneum Kirby's MSS.? 
iEneous-black, shining. Antennae and legs castaneous, the base 
of the former and of the thighs and tibiae blackish. Head thorax 
and elytra deeply sculptured with large punctures. Thorax with 
the sides serrated, posterior angles acuminated. Elytra much 
broader than the thorax with the posterior margin sinuated. 
Abdomen very minutely punctured, the sides elevated. 
In the Author's and other Cabinets , 
