Staphylinidce of tlie Amazon Valley. 221 



gustum, nigro-fiiscum, elytrorum apice, antennis pedi- 

 busque testaceis ; capite opaco, dense subtiliter rugoso- 

 punctato ; prothorace opaco, basi linea elevata nitida ; 

 elytris crebre fortiterque punctatis. Long. corp. 3^ lin. 



Mas : abdomine segmento 4" ventrali in spinam breviorem 

 producto, trochanteribus posticis spinoso-elongatis, femori- 

 busque posterioribus medio obtuse dentatis. 



Extremely closely allied to C. angustum, but even 

 narrower than that species; the spine on the 4th ventral 

 segment of the male much shorter, the femora on the 

 other hand distinctly angularly dilated on the underside ; 

 in other respects nearly the same as angustum. 



Ega; one specimen, $ . 



16. Cryptohium laiicolle, n. sp. Nigrum, nitidum, 

 antennis pedibusque rufis ; capite crebre fortiterque punc- 

 tato, thoracis latitudinis; hoc subquadrato, elytris paulo 

 angustiote, crebre punctato, linea media l^evi ; elytris crebre 

 fortiterque substriato-punctatis. Long. corp. 3 lin. 



Mas latet. 



Very different from the other species here described by 

 the shorter middle joints of the antennae. These are 

 yellowish and rather short, not reaching half-way back 

 the thorax; 1st joint about as long as the four following 

 together, 3rd joint scarcely longer than second, 4th joint 

 rather longer and narrower than 5th, joints 5 — 10 each 

 about as broad as long, 11th joint slightly longer than 

 10th. Palpi yellowish ; mandibles pitchy. Head rather 

 short and broad, quite as broad as the thorax, the an- 

 tenna inserted not far from the eyes ; it is closely and 

 coarsely punctured. Thorax rather longer than broad, 

 nearly as broad as the elytra, straight at the sides, closely 

 and rather coarsely punctured, a line down the middle 

 smooth. Elytra rather longer than the thorax, blackish, 

 a little paler at the base and shoulders, rather closely and 

 coarsely punctured, the punctures distinctly an'anged in 

 lines. Hind body rather closely and not altogether finely 

 punctured. Legs yellowish. 



Ega; one specimen, $. 



17. Cryptohium anyustifrons, n. sp. Rufo-piceum, 

 nitidum, antennis pedibusque rufo-testaceis ; capite elytris 

 duplo angustiore, subopaco, subtiliter punctato, vei'tice 

 elongato; prothorace utrinque serie dorsali punctorum 



