] 08 . 
RUGILUS FRAGILIS. 
Order Coleoptera. Fam. Staphylinidse Lat Leach. 
Type of the Genus Paederus orbiculatus Fab. 
Rugilus Leach's Mss. — Paederus Fab., Oliv., Panz., Grav., Gyll . — - 
Staphylinus Marsh. 
Antennce inserted before the eyes at the base of the mandibles, 
subclavate, pubescent, and pilose, 11 -jointed, basal joint the 
longest, the 3rd scarcely longer than the 2nd the remainder in- 
creasing in diameter to the terminal joint which is subconic 
(fig. 6). 
Labrum very large exserted, transverse ovate, pilose, bidentate 
in the centre (1). 
Mandibles large bent ; very acute, producing 4 teeth on the in- 
ternal side in one and 3 in the other (2). 
Maxillce very broad bilobed, densely ciliated, superior lobe the 
smaller, inferior one broad. Palpi not very long, 4-jointed, basal 
joint small, 2nd long clavate, 3rd longer and more pilose very 
robust, subclavate ovate, terminal joint papillaeform (3). 
Mentum transverse pilose, sinuated at the base, narrowed an- 
teriorly. Lip long and broad very hairy at the apex, slightly 
produced on each side where the palpi are inserted, behind which 
is a maxillaeform p'rocess strongly ciliated (4 c,*). Palpi 3-joint- 
ed, 2nd joint rather larger than the 1st, ovate producing a few 
short bristles, 3rd slender cylindric truncate (4). 
Head much larger than the thorax orbicular. Eyes small, lateral. 
Thorax attached to the head by a very thin neck, subovate, truncated 
behind, attenuated anteriorly. Scutellum distinct. Coleoptra qua- 
drate broader than the head, not covering half the abdomen. Wings 
ample, longer than the Abdomen which is broad, the penultimate 
joint much longer than the others. Legs long, anterior the most 
robust. Tibiae simple. Tarsi 5 -jointed, densely pilose beneath, basal 
joint the longest in the 4 posterior, terminal the longest in the an- 
terior. Claws small (5, a fore leg). 
Fragilis Grav. Coleop. Microp. p. 140. n. 7. 
Black, thorax and legs reddish. Eyes black. Head and labrum 
pubescent, black, thickly punctured. Antennae and trophi dull 
castaneous, the former piceous towards the base. Thorax and 
neck dull red or pale castaneous, rather thickly punctured, with 
an obscure channel down the centre. Elytra and scutellum pu- 
bescent, rather thickly punctured, piceous, inclining to chesnut 
at the shoulders, to ochre at the apex. Abdomen black pu- 
bescent, very minutely punctured : anterior legs ferruginous red ; 
4 posterior castaneous-piceous. 
In the Cabinet of Mr. Cooper. 
