UJ 
418 . 
OXYPORUS MAXILLOSUS. 
Order Coleoptera. Fam. Staphylinidse. 
Type of the Genus, Slaphylinus rufus Linn. 
Oxypohus Fab., Oiiv Grav., Curl.— Staphylinus Linn. fyc. 
Antenna clavate pilose, not longer than the head, remote, in- 
serted close to the eyes at the base of the mandibles, 1 1 -jointed, 
basal joint the longest and stouter than the 4 following, 2nd and 
3rd oblong, 4th and 5th somewhat obtrigonate, the remainder 
forming an elongate ovate club, composed of cup-shaped joints, 
excepting the terminal one which is suborbicular, the apex com- 
pressed ( 6 ). 
Labrum membranous, subquadrate, deeply and acutely notched 
in the centre and ciliated ( 1 ). 
Mandibles long and porrected, slightly curved and pointed (2) . 
Maxilla terminated by an elongated dilated rounded lobe, pu- 
bescent towards the apex, with a long sublanceolate one on the 
inside ciliated. Palpi longer than the maxillae, 4 -jointed, basal 
joint minute, 2 nd the longest, 3 rd shorter, both clavate, with a 
few bristles towards the apex 3 4th scarcely so long as the 3rd, 
slenderer and elongate ovate (3). 
Mentum broadest at the base, narrowed and cleft at the apex. 
Labium narrow and subovate, pilose at the apex, on each side 
are inserted the Palpi which are triarticulate, basal joint short 
and slender, 2nd long and clavate, 3rd large crescent-shaped (4). 
Head scarcely broader than the thorax , nearly orbicular. Eyes rather 
small , placed at the anterior angles of the head. Thorax orbicular , 
truncated before. Scutellum minute. Elytra subquadrate , broader 
than the thorax , the angles rounded. Wings ample. Abdomen nearly 
as broad as the elytra and twice as long, the sides thin and elevated, 
tapering suddenly at the apex. Legs rather short. Thighs a little 
stouter than the Tibiae which have minute spurs at the apex. Tarsi 
simple in both sexes, short and 5 -jointed, 4 first joints short, 5 th as 
long as the others united. Claws slender and hooked (5, fore leg). 
Maxillosus Fab. Ent. Syst. 1 . 6.531 . 2. — Curtis's Guide , Gen. 219. 2. 
In the Cabinets of the British Museum and Mr. Kirby. 
This beautiful genus is well characterized by its short and 
stout antennae and abdomen, and particularly by the form of 
the labial palpi ; yet notwithstanding these admirable charac- 
ters, it appears to me to be very difficult to assign to the genus 
its proper situation. Latreille commences the Staphylinidse 
