Staphylinid<2 of the Amazon Valley . oOl 



head and tliorax ; 1st joint elongate and slender, not quite 

 so long as the three following together; 2nd joint rather 

 long ; 3rd joint elongate and very slender, longer than 

 2nd; 4 — 10 each very slender, each slightly shorter than 

 its predecessor, even the 10th three times as long as 

 broad; 11th slender, but distinctly stouter than the pre- 

 ceding ones, rather longer than 10th. Labrum large, 

 Avith two short, obtuse denticles in the middle, forming its 

 most prominent part ; slightly emarginate on each side of 

 these, and thence falling away on either side as an oblique 

 sinuation to the lateral angle. Mandibles elongate, ab- 

 ruptly curved, stout at the base ; the left in the middle 

 Avith a large stout tooth, which is slightly emarginate on 

 its inner side ; the right one with two rather large teeth, of 

 Avhich the upper one is the longer. Head broader than 

 the thorax, quite as broad as the elytra ; the eyes large, 

 and very outstanding in front ; the sides behind the eyes 

 rounded and naiTowed in a curve to the neck, yelloAvish in 

 colour, rather flat; the surface with Sunius punctuation, 

 forming rather large meshes, but immediately in front of 

 the neck the sculpture obsolete ; the underside almost 

 impunctate. Thorax a good deal narroAver than the elytra, 

 the sides in front of the middle much rounded and nar- 

 roAved to the neck, only A'^ery slightly curved, and narrowed 

 from the Avidest part to the base ; its colour and sculpture 

 similar to the head. Elytra elongate, one and a half times 

 the length of the thorax, yellowish, each Avith a dark spot 

 on the middle, moderately finely and closely punctured. 

 Hind body elongate and slender, dull, but only sparingly 

 and indistinctly punctui'ed. Legs elongate, A^ery pale. 



In the male the hind margin of the ventral plate of the 

 6th segment is broadly but slightly emarginate ; the 7th 

 has a very large and deep semicircular excision. 



Ega ; a single individual. 



16. Sunius bispinus, n. sp. Elongatus, subcylindricus, 

 testaceus, elytris abdomineque minus distincte fusco-A'arie- 

 gatis; antennis elongatis, tenuibus, labro medio breviter 

 bispinoso. Long. corp. 2| lin. 



Antennfe almost Avhite, elongate and slender ; joints 

 8 — 10, though very slender, each distinctly stouter than 

 its predecessor ; 11th joint a good deal stouter and a little 

 longer than the 10th. Labrum large, Avith tAvo short, 

 distinct spines in the middle. Thorax rather broad. 



