Staphylinidce of the Amazon Valley. 89 



the same segment bears a notch in the middle at the ex- 

 tremity, the hinder angles of which are acuminate, but 

 not produced. 



Ega ; two individuals, $ and $ . 



Obs. — The above description is made from the female 

 individual, the male specimen being greatly mutilated ; 

 I have some doubts indeed whether it is of the same 

 species as the female, for it has the antennae a little shorter, 

 and the intermediate joints darker, than in the female de- 

 scribed. 



10. Cojyroporus cognatus, n. sp. Convexus, piceus, niti- 

 dus, antennarum basi, pedibusque rufis; capite thoraceque 

 Isevigatis, hoc basi fere truncato ; elytris obsolete punc- 

 tatis, angulo externo obtuso. Long. corp. 1 ^ lin. 



Antennae slender, moderately long ; blackish, with the 

 three basal joints yellowish, the apex of the 1 1th joint also 

 paler ; 3rd joint slightly shorter than 2nd ; 4th longer than 

 broad; 10th about as long as broad. Thorax with the 

 base only slightly sinuate on each side, shining, impunc- 

 tate. Elytra ample, obsoletely and sparingly j^unctured, 

 with very fine strigosities connecting the punctures ; their 

 hind angle moderately distinct. Hind body greatly nar- 

 rowed towards the extremity. Legs red. Mesothoracic 

 carina only a little elevated. 



In the male the dorsal plate of the 7th segment ends in 

 four teeth, of which the middle ones project much farther 

 back than the side ones; the teeth are but short and the 

 lateral interval extends much more to the front than does 

 the middle interval ; the ventral plate bears a broad but 

 not deep angular notch, the sides of which are only indis- 

 tinctly sinuate, and its lateral extremities are not pro- 

 duced. 



Anana; a single male found by Dr. Trail on the 6tli 

 September, 1874. 



Obs. — This species is very similar to C. inclusus; it is 

 about the same size, but appears a little broader ; the an- 

 tennae are darker in colour and more elongate. When both 

 sexes of each species are known, I have no doubt good 

 sexual distinctions will be fomid. 



11. Coproporus conformis, n. sp. Sat convexus, 

 nitidus, rufus, capite, prothoracis disco, antennisque piceis, 

 his basi testaceo ; elytris obsolete pimctatis, lateribus hand 

 impressis, angido externo obtuso. Long. corp. 1^ lin. 



