Staphylinidoi of the Amazon Vallcij. 265 



tata, antennis peclibusquc obscure rufo-testaccis ; elytris 

 testaceis, apiccm versus iufuscatis; prothorace basin versus 

 leviter angustato, medio linca glabra abbi-eviata, posterius 

 profunde canaliculata. Long. corp. 1| lin. 



AntennjE setose, obscure reddish, the two basal joints 

 stout, the rest slender ; 3rd joint distinctly longer than 

 4th. Labnmi reddish, Avlth two approximate denticles in 

 the middle. ]Mandil)les red, each with two sharp teeth in 

 the middle. Head large, broader than the thorax, and 

 quite as broad as the elytra; the vertex straight, the hind 

 angles much romidcd ; the eyes rather large and promi- 

 nent, reaching quite half- av ay to the vertex ; the colour 

 obscure ]iitchy red, the surface densely and indistinctly 

 punctured. Thorax narrower than the elytra, about as 

 long as broad, distinctly narrowed behind, the front and 

 front angles much rounded, the colour obscure reddish, 

 rather paler than the head ; the surface densely covered 

 with fine asperities, along the middle a fine glabrous line, 

 the hind part of Avhich is occupied by a deej) and distinct 

 channel. Elytra a little longer than the thorax, finely 

 and not very densely pimctured, yellowish, infuscate 

 towards the extremity; along the middle of each are 

 indications of two abbreviated impi-essed lines. Hind 

 body very densely and finely punctm-ed. Legs yellowish; 

 front tarsi distinctly dilated, hind tarsi vdi\\ the 4tli joint 

 quite simple. 



Effa; a sino-le individual, which exhibits no certain 

 indication of sex, and is probably a female. 



17. Lithocharis ardua, n. sp. Fusco-ferruginea, an- 

 tennis pedibusque testaceis, thorace elytrisque leviter 

 nitidulis ; thorace brevi, basin vers^^s angustato, medio 

 lineji abbreviata, glabra, canaliculata. Long. corp. 

 H Ihi. 



AntennfB setose, yellow; 1st and 2nd joints stout, the 

 others slender, 3rd not longer than 4th. Labrum large, 

 with two distinct approximate teeth in the middle, and a 

 little sinuate on each side of these, reddish. jNIandibles 

 reddish-yellow, rather slender, each with two rather large, 

 sharp teeth in the middle. Head large, broader than the 

 thorax, and quite as broad as the elytra, quadrate, the hind 

 ano-les riu'ht ano-les and a little rounded ; the vertex almost 

 straight, the colour obscure pitchy, dull ; the surface 

 closely and indistinctly, in front obsoletely, pimctured. 



