StaphylinidcB of the Amazon Valley. 87 



rounded; the base scarcely sinuate smooth sh^^^^^^^^^ 

 impunctate ; the lateral mai;gins pitchy. The elytra axe 

 nelrly black, longer than the tlj^^^ax very finely pun^ 

 tured, without impression near the side; the hmd angle 



^ Tnlhelrthfdtsal plate of the 7 th segment ends in 

 foux almost equidistant spines, of which those - "d^^^ 

 are the more slender, and a good deal the J^nger , the 

 ventral plate bears a deep angular notch, the sides ot 

 wWch ar^e a good deal produced, so as to form projecting 

 teeth. 



^l^t^T^^ to be extremely closely 

 allied to C. p^itus, and has tl^^ -esothoracic carina 

 similar, but the antenna are entirely pale ; I am sox-xy 



1 am unable to compare the sexes of the two species. 



8 Covroporus ignavus, n. sp. Sat convexus nitidus, 

 piceus antennis bafi rufo, articido ultimo apxce testaceo, 

 PTus rufis; prothorace basi -trinqjie leviter smuato ; 

 elytrorum angulo externo sat rotundato. Long. corp. 



2 lin. 



Antenna moderately long, rather slender, but a good 

 deal thickened towards the extremity; the three basal 

 foi yellow! the follo^ving ones pitchy, the extx^enixty of 

 triUhyelbw; 3rd jointfoUy as long as 2nd ; 4th joxnt 

 onger ^ broad; 10th very xiearly as long as broad 

 Thorax very transverse, the hind angles a little rounded 

 itft not nroduced, the base a little smuate on each side; 

 k is of nftry coloxir, with the sides paler, almost im- 

 minctate Elytxa very finely and not closely punctured, not 

 FZSessek at the sides, the hind angle moderately rounded. 

 Zd body pitchy, p^ler towards the extremity, rather 

 closely and distinctly punctured. Legs red. 



In the female the dorsal plate of the 7th ^^gment ends 

 in four elongate spines; the middle ones axe the more 

 sknder they are a little longer than the lateral ones, and 

 the space b^etween them is not quite so broad as that 

 between them and the side spine ; the three spaces extend 

 afoTequally far forward ; the vexitral plate ends m four 

 sWsaboutequaUy stout; those in the middle are distinctly 

 loCer than the side ones, and the space between them is 

 sca?cely so broad as that between them and the lateral 

 s"the middle space does not extend so far forward as 



