Staphylinidoi of the Amazon Valleij. 151 



1. Stnphijlinus subcjjaneus, n. sp. Niger, capite 

 tlioraceque nigro-cyaneis, abdomine segmcntis duobus 

 ultimis flavis, antennis rufo-testaceis. Long. corp. 8 hn. 

 Mas : abdomine segmento 7° ventrali apice emarginato. 

 About the size of S. chalcocephalus, but Avith the head 

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

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

 ioint longer than 2nd, 4—10 transverse, differmg but 

 little from one another, 11th sinuate and acumuiate 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 ot an 

 obscure-bluish colour like the head, neither very closely 

 nor coarsely punctured, with a short smooth Ime in ii'ont 

 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, under which they are alutaceous but not 

 punctured. Scutellum clothed with black pubescence 

 Hind body narroAved towards the extremity, quite dull 

 and densely clothed with a very fine concolorous pubes- 

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

 black, tibiai strongly spinulose. _ * i o 



Ega and Tunantins ; two specimens, ^ and v: . 



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

 tennis rufis, capite thoraceque subcyaneis, abdomine 

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

 tomento hand variegato. Long. corp. 7 hn. 



Mas: abdomine segmento 7° ventrah apice medio leviter 

 emarginato. 



Antenna short, reddish, with the basal joints yellow ; 

 3rd ioint scarcely longer than 2nd, 4-10 transverse, 

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

 length or breadth. Mandibles pitchy red; palpi yellow. 

 Head a good deal narrower than the thorax, subtnangular, 

 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 broad as the elytra, slightly nar- 

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



