i- 
287 . 
MASOREUS LUXATUS. 
Order Coleoptera. Fam. Carabidse Lat Leach . 
Type of the Genus, Trechus laticollis Sturm. 
Masoreus Zieg., Dej. — Badister Creut. — Trechus Sturm. 
Antennae inserted before the eyes at the base of the mandibles, 
pubescent, thickened towards the extremity, composed of 11 
joints, nearly of equal length, basal joint scarcely more robust 
than the penultimate one, 2nd 3rd and 4th scarcely so long and 
rather slender, the remainder slightly increasing in diameter to 
the apical one, which is rather the longest, and elongate-ovate (6) . 
Labrum transverse, narrowed anteriorly, all the angles rounded, 
slightly emarginated and ciliated with bristles (1). 
Mandibles exserted, considerably bent and acute, with a small 
blunt tooth at the middle and a larger protuberance below (2). 
Maxilla bent and very acute at the apex, the internal margin 
ciliated with bent bristles. Palpi naked internal as long as the 
maxillae, biarticulate, basal joint the longest, clavate, 2nd semi- 
ovate 5 external robust, 4-jointed, basal joint curved, truncated, 
2nd dilated, compressed, obovate, 3rd short cup-shaped, 4th as 
long as the 2nd, cylindric, terminated by a vesicle (3). 
Mentum transverse, the sides only produced into lobes, without 
a central one. Labium subquadrate, the anterior angles forming 
2 obtuse lobes, with a few bristles between. Palpi long, attached 
to distinct scapes, triarticulate, basal joint small curved, 2nd and 
3rd equally long, the former producing 2 bristles on the inside, 
the latter slightly attenuated at the ends and truncate (4). 
Head somewhat triangular, narrowed behind. Eyes small but promi- 
nent. Thorax transverse , considerably broader than the head, sides 
rounded, posterior margin slightly lobed. Scutellum placed upon a 
peduncle which separates the thorax from the Elytra, the latter are 
oblong, depressed , slightly truncated at the extremity and scarcely 
covering the body. Legs, anterior the strongest. Tibiae, anterior 
notched and spined. Tarsi, anterior only dilated a little, furnished 
with strong spines, basal joint the largest , 2nd and 3rd obtrigonate, 
4th cordate, 5th long, clavate. Claws long and simple (5, afore leg.) 
Luxatus Creut., Dej. 3. 53 7. 1. — laticollis Sturm 6. t. 150, D. 
Very glossy, pale castaneous. Head black excepting the clypeus. 
Thorax with a fine channel down the middle, and 2 shallow foveae 
behind not at the angles. Elytra with a large black patch leaving 
the base and margins castaneous j each having an abbreviated 
and 8 long faintly punctured striae with a few large marginal punc- 
tures towards the apex. Antennae trophi and legs inclining to 
ochreous. Underside somewhat piceous. 
In the Cabinets of Mr. Dale and the Author. 
