Staphylinidce of the Amazon Valley. 233 



dense punctato, medio parce fortius puuctato ; prothorace 

 crebre fortiter punctato, linea media Irovi. Long. corp. 



4i lin. ^ ... „ , 



ISIas: abdomine segmento 7° ventrali apice prolunde 

 exciso ; sexto medio longitudinaliter impresso, 5° obsolete 

 impresso. 



Ratlier broader and more parallel than L. geminum. 

 Closely allied to L. opalescens, but slightly narrower, and 

 the male characters different. Tlie antennse are reddish- 

 yellow, long and slender, rather longer than head and 

 thorax ; the 3rd joint longer than the 2nd ; the penultimate 

 joints shorter than the intermediate ones. The head is as 

 broad as the thorax, pitchy, dull, the sides and back part 

 very densely and finely punctured, the middle and front 

 part sparingly and more coarsely pimctured. The thorax 

 is quadrate, about as broad as the elytra, straight at the 

 sides, quite as long as broad, the Avhole of the sides rather 

 "coarsely and closely punctured, a line along the middle 

 smooth ; it is of a reddish colour and rather shining. The 

 elytra are rather longer than the thorax, reddish, mode- 

 rately closely punctured. The hind body is reddish, 

 closely and finely punctured. The legs are yellow. 

 Tapajos; mmierous specimens. 



This species is so closely allied to the two precedmg 

 that it is scarcely distinguishable fi'om them except by the 

 sexual characters. The male has a rather deep and narrow 

 notch, not contracted at the entrance, on the hind margin 

 of the 7th segment; the 6th segment has a distinct but ill- 

 defined longitudinal impression along the_ middle, and 

 there are indications of a very slight depression on the 5th 

 segment, the sides of this having, in fresh specimens, some 

 rough black pile, which appears very easily removed. 

 The female has the hind margin of the 7th ventral seg- 

 ment rounded and entire, and the dorsal lobe of the 8th 

 short, and only very slightly laterally compressed towards 

 the apex. 



5. Lathrohium parallelum, n. sp. Piceum, nitidum, 

 antennis pedibusque rufo-testaceis ; capite dense subtihter 

 punctato, disco la3vi, fronte parce fortiter punctata^ pro- 

 thorace crebre sat fortiter punctato, linea media im- 

 punctata. Long. corp. 4 lin. 



Mas: abdomine segmento T ventrali apice prolunde 

 exciso, segmento 6° kte profundeque longitudinaliter 

 impresso, ad impressionis apicem exciso. 



