Staphylinidce of tJie Amazon Valley. 223 



longer tlian broad, of a sliining-reddish colour, mode- 

 rately finely and not closely punctured ; a broad space 

 along the middle, smooth. Elytra darker in colour than 

 the thorax, scarcely longer, shining ; each with six dis- 

 tinct rows of punctures. Hind body reddish ; the inter- 

 mediate segments infuscate, rather finely but not closely 

 punctured. Legs yellow. 

 Tapajos ; one specimen, $ . 



19. Cri/ptobium tnsfe,n. sp. Angustum, nigro-fuscum, 

 antennis, palpis, pedibusque testaceis, antennis late infus- 

 catis; capite dense punctato, fere opaco ; prothorace nitido, 

 crebre sat fortiter punctato, medio la3vigato ; elytris thorace 

 longioribus, dense punctatis, subnitidis. Long. corp. 2^ 

 lin. 



AntennjB modei'ately long, slender; base of 1st joint 

 yellowish, its apical portion and the following joints infus- 

 cate ; the apical joints again paler ; 3rd joint not so long 

 as 2nd, 10th quite as long as broad. Palpi yellow. Head 

 about as broad as the thorax, constricted in front of the 

 eyes, which are placed about midway at the sides ; its sur- 

 face is densely punctured, the punctures becoming finer 

 and denser towards the vertex, so that the part behind 

 the eyes is quite opaque ; it is nearly black in colour, its 

 greatest breadth just in front of the rounded hind angles. 

 Thorax pitchy, shining, much narrower than the elytra, 

 longer than broad, a little rounded and narrowed towards 

 the front; rather coarsely punctiired, but with a broad, 

 smooth space along the middle ; the punctures bounding 

 this space on each side are closely packed, so as to form 

 an irregular series, which becomes indistinct towards the 

 front. Elytra a little longer than the thorax, densely 

 punctured, the punctures rather deep and moderately 

 coarse, the interstices not dull, — they are nearly black. 

 Hind body very finely punctured, black, and quite dull. 

 Legs yellow ; coxjb and under face of the insect obscure 

 reddish in colour. 



A single individual, which I believe to be a female, 

 was captured by Dr. Trail on the 5th November, 1874, 

 but he has not sent me the special locality. 



20. Cryptohium Traili, n. sp. Elongatum, brunneum, 

 antennis pedibusque testaceis, abdomine segmento 6° nigri- 

 cante ; capite angusto, verticem versus attenuato ; protho- 

 race subcylindrico, antrorsum leviter angustato ; elytris 



