StaphylinidcB of the Amazon Valley. 151 



1. StaplnjUnus sithcyancus, n. sp. Niger, capite 

 tlioraccque iiigro-cyaneis, abdomine segnientis duobus 

 ultimis flavis, anteiinis rufo-testaceis. Long. corp. 8 lin. 



Mas : abdomine segmento 7° ventrali apice emarginato. 



About the size of S. chalcoeephalus, but with the head 

 smaller. Antenna3 about the length of the head and one- 

 third of the thorax ; they are of a yellowish colour ; 3rd 

 joint longer than 2nd, 4 — 10 transverse, differing but 

 little from one another, 11th sinuate and acuminate at 

 the extremity. Mandibles pitchy ; palpi yellow. Head 

 smaller than the thorax, narrowed in front, blackish-blue, 

 moderately coarsely and moderately closely punctured, 

 clothed with a fine pubescence. Thorax not quite so long- 

 as broad, a little narrowed towards the front, the sides 

 straight, the base and hind angles rounded, above of an 

 obscure-bluish colour like the head, neither very closely 

 nor coarsely punctured, with a short smooth line in front 

 of the scutellum, and clothed with a dark fuscous pubes- 

 cence. Elytra about as long as the thorax, dull bluish - 

 black, rendered black and opaque by a fine depressed 

 pubescence, inider which they are alutaceous but not 

 punctured. Scutellum clothed Avith black pubescence. 

 Hind body narrowed towards the extremity, quite dull 

 and densely clothed with a very fine concolorous pubes- 

 cence, black, with the 6th and 7tli segments yellow. Legs 

 black, tibiiLTB strongly spinulose. 



Ega and Tunantins ; two specimens, $ and ? . 



2. Staphylinus parviceps, n. sp. Opacus, niger, an- 

 tennis rufis, capite thoraceque subcyaneis, abdomine 

 segmentis 6°, 7^que late testaceis, 6" basi nigro ; abdomine 

 tomento haud variegato. Long. corp. 7 lin. 



Mas: abdomine segmento 7*^ ventrali apice medio leviter 

 emarginato. 



Antennas short, reddish, with the basal joints yellow ; 

 3rd joint scarcely longer than 2nd, 4 — 10 transverse, 

 6 — 10 scarcely at all differing from one another either in 

 length or breadth. Mandibles jjitchy red ; palpi yellow. 

 Head a good deal narrower than the thorax, subtriangular, 

 the punctures only moderately coarse, those on the an- 

 terior part not dense ; it is of a black colour, with a pale 

 blue reflection and very slightly shining. Thorax just as 

 long as broad, nearly as In-oad as the elytra, slightly nar- 

 rowed in front, covered with a rather coarse but not deep 



