StaphylinidcB of the Amazon Valley. 231 



as broad as the elytra, slightly broader than long, a little 

 narrowed behmd, rather coarsely and irregularly punc- 

 tured, a narrow space along the middle smooth, and in 

 the centre of this a fine channel ; it is black and shining. 

 Elytra distinctly longer than thorax, shining pitchy black, 

 rather finely and not closely punctured. Hind body 

 pitchy, dull, very finely and not closely punctured. Legs 

 pitchy, the hind ones reddish ; first joint of hind tarsi very 

 short, quite hidden by the tibia. In the male the 7th 

 segment of the hind body has on the underside, at its 

 extremity, a rather deep triangular notch. The 6tli seg- 

 ment has the hind margin broadly emarginate; in front 

 of this it has a broad triangular impression, the middle 

 part of Avhich is smooth, and the sides fiu-nished with short, 

 coarse, black hairs. 

 Ega ; one specimen. 



2. Lathrohium opalescens, n. sp. Piceum, nitidum, 

 antennis pedibusque testaceis; capite, thorace elytrisque 

 subtiliter opalescentibus ; capite vertice angulisque poste- 

 rioribus dense, subtilissime rugoso-punctatis, opacis et 

 pubescentibus, disco Isevi, fronte fortiter parcius punctata ; 

 prothorace crebre pmictato, linea media impunctata ; elytris 

 crebre punctatis. Long, coi^p. 4^ lin. 



Mas: segmento 7° ventrali apice medio late, sat pro- 

 funde semicirculariter excise, ante excisionem leviter im- 

 presso ; segmento 6° leviter emarginato. 



Allied to L. hrunnipes, but greatly broader, and less 

 cylindric. Antennae slender and elongate, rather longer 

 than head and thorax, yellow; the 3rd joint longer than 

 2nd, the penultimate joints shorter than the intermediate 

 ones. Head nearly as broad as the thorax, the back and 

 the hind angles very densely and finely punctured, quite 

 opaque, the front part Avitli an opalescent reflection; a 

 broad space in the middle smooth, in front of Avhich it is 

 sparingly punctured. Thorax quadrate, about as broad as 

 the elytra, its length equal to its breadth, regularly but 

 not closely punctured, a line along the middle smooth ; it 

 is of a pitchy colour, with opalescent reflection. Scutellum 

 impunctate. Elytra rather longer than the thorax, mode- 

 rately closely, and not altogether finely punctured. The 

 hind body is obscurely rufesceut, very finely and closely 

 punctured, the 7th segment sparingly punctured. Legs 

 yellow. 



The male has a very broad but not deep notch at the 



