StaphylinidcB of the Amazon Valley. 179 



with several other large punctures at the back, and be- 

 tween and behind these with numerous finer punctures ; 

 it is of a shining-brassy colour. Thorax rather longer 

 than broad, distinctly narrowed behind, the front angles 

 greatly deflexed and rounded, the sides sinuate ; it is of a 

 reddish colour, with the disc indistinctly brassy ; it has 

 a dorsal row of five coarse punctures on each side the 

 middle, and has three or four other coarse ptmctures on 

 each side, and besides this has the extreme sides and front 

 angles densely and rugosely punctured. The scutelhuii 

 is densely and finely rugose-punctate. The elytra are 

 greatly broader than the thorax, and about as long ; 

 they are of a tawny colour, with a broad violet band across 

 the middle ; they are densely and rather finely punctiu-ed, 

 and not shining. The liind body is ta\Yny ; segments 

 2 — 4 black across the middle, 5 and 6 nearly entirely 

 black, the hind margin of the latter and whole of the 7th 

 segment pale yellow ; the black parts are closely and 

 rather coarsely punctured ; besides the very coarse, de- 

 pressed, black pubescence of segments 4 — 6, there are 

 numerous other long, outstanding, black setfe. The legs 

 are long, of a yellowish colour. The breast tawny. 

 Obydos ; two individuals, both, I believe, females. 



19. PJiilonthus serraticornis, n. sp. Fulvus, nitidus, 

 capite nigro; antennis fuscis articulo ultimo testaceo, 

 articulis 4 — ^10 intus productis ; prothorace serie dorsali 

 subtiliter 6-punctato. Long. corp. 4^ lin. 



Mas : tarsis anticis simplicibus. 



This is another aberrant species which will probably 

 ultimately be separated generically from Pliilonthus, the 

 antennae being distinctly serrate and the lateral lines of 

 the under surface of the prothorax not joined till quite at 

 the front part of the coxal cavities. It is broad and rather 

 depressed. The antennte are rather shorter than head 

 and thorax, of an obscure colour, each joint a little red at 

 the base ; the 1 1th joint yellowish ; joints 5 — 10 distinctly 

 produced and pointed on the inner side, at their broadest 

 part broader than long; 3rd joint long, being considerably 

 longer than the 2nd. Mandibles and palpi reddish, the 

 mandibles very short. Head black and shining, orbicvdate, 

 the eyes large, the clypeus convex, so as to render the in- 

 sertion of the antenna? a little different to what is usual in 

 Pliilonthus; the middle parts of the head smooth, the back 



X 2 



