266 MANDIBU L AT A. COLEOPTE UA. 



terminal joint minute, subulate: wza/it/ZA/o' forcipated, curved, acute, with 

 the apex bifid, the outer tooth very long : head suborbiculate, or subcordate, 

 thickly punctured : t/iorax rectangular, elongate, thickly punctate : bodi/ 

 linear-elongate, slightly convex : /<?g\s' stout; femora compressed, especially 

 the anterior, which are usually armed beneath with a tooth, more or less 

 distinct ; anterior iibicc dilated exteriorly, also armed with a tooth towards 

 the base : anterior tarsi in both sexes broadly dilated. 



By their great length, the insects of this genus approximate to 

 Gyrohypnus ; but from the Gyrohypni they may be at once known 

 by having the anterior tarsi considerably dilated; the terminal joint 

 of the palpi minute, the antennas not geniculated, by which union of 

 characters they differ from the other Staphylinidte, excepting 

 Achenium, from which they depart by their convex form, dissimilar 

 thorax, &c. The species occur beneath stones or mosses, in dung- 

 hills, &c., in damp situations, chiefly in the autumn and spring. 



Sp. 1. quadratum. Atrum, pilosulum, thorace quadrato, antennis pedibusque 



piceis, capite orbiculato. (Long. corp. SJ lin.) 

 St. quadratus. Paykull. — Lat. quadratum. Steph. Catal. 286. No. 3068. 



Deep black, slightly pilose and shining : head subcordate, finely punctured : 

 thorax subquadrate, very delicately and thickly punctured : elytra finely 

 punctured, and slightly glossy : abdomen obscure, with long anal styles : 

 legs pitchy, the anterior femora slightly thickened and obscurely dentate : 

 tarsi red, anterior slightly dilated : antennce pitchy, with the apex rather 

 palest, the basal joint longer and stouter than the remainder. 



The legs are sometimes entirely testaceous ; and the apex of the elytra has 

 occasionally a small red spot. 



Abundant in Battersea-fields, and near Rochester ; also found in 

 the Isle of Sheppy, in Devonshire, Norfolk, Suffolk, &c. " Cra- 

 mond." — Rev. W. Little. 



Sp. 2. brunnipes. Nigrum, nitidiusculum, thorace oblongo, pedibus rufis,J'emo- 

 ribus tibiisque anticis subdentatis : mas segmento penultimo abdominis late et 

 profundi emarginato. (Long. corp. 3^ — 4 lin.) 



St. brunnipes. Fabricius. — Lat. brunnipes. Steph. Catal. 286. No. 3069. 



Black, rather shining : head suborbiculate, clothed with short scattered hairs, 

 pimctured : thorax oblong, punctured, with a smooth dorsal line : elytra 

 slightly pubescent, slightly punctured : abdomen with the margins of the 

 antepenultimate joint whitish ; in the male the penultimate joint beneath is 

 broadly and deeply notched and channelled; and in the female the same part 

 is broadly and deeply notched on each side, and has an elongate somewhat 

 conic central lacinia, with its apex rounded, and nearly reaching to the tip of 



