Staph i/linid(B of the Amazon Vallci/. 347 



body Avith tlie four basal segments Avitli imbricate sculp- 

 ture, and also with the basal portion of the following seg- 

 ment, with indistinct imbrications. Legs pale yellow, 

 moderately long. 



In the male the ventral plate of the 7th segment is very 

 slightly produced, the extremity is broad and faintly tri- 

 sinuate ; the dorsal plate of the same segment is much 

 rounded at the extremity. 



Tapajos ; a single male. 



Though this species greatly resembles P. simplex and 

 the allied species here described, it may be distinguished 

 from them by its shorter antennas. 



9. Palaminus apicalis, n. sp. Rufescens, antennis, 

 palpis, pedibusque testaceis, abdomine apice piceo; thorace 

 infnscato, sub-transversOj ba.siu versus angustato. Long, 

 corp. If lin. 



Mas latet. 



Fem. : abdominp segmento 7° ventral! apice emar- 

 ginato. 



Antenna3 rather short, about as long as head and thorax, 

 pale yellow ; 3rd joint not longer than 2nd, last joint 

 thickened, a good deal broader than the 10th joint and 

 quite as stout as the basal joint. Maxillary palpi pale 

 yellow, their last joint rather small. Head rather small, 

 about as broad as the thorax; the colour reddish, bnt rather 

 infuscate across the middle ; the vertex scarcely emarginate, 

 the vertical line fine, at the sides very near to the eyes, 

 scarcely deflexed and slightly interrupted in the middle. 

 Thorax a little shorter than broad, distinctly narrower 

 than the elytra, curved at the sides and a good deal nar- 

 rowed behind; the colour reddish, but much infuscate; the 

 pimctuation rather fine; the surface with two impressions 

 on the middle towards the base, separated by a slight, 

 raised, smooth space. Elytra about one and a half times 

 as long as the thorax, their punctuation sparing except 

 about the scutellum; they are reddish in colour at the 

 base, pale yellow at the extremity. Hind body rather 

 dark red, with the 7th segment, and the 8th infuscate ; 

 four basal segments with imbricate sculpture. Legs pale 

 yellow. 



The female has the ventral plate of the 7 th segment of 

 the hind body distinctly emarginate at the apex. 



Tapajos ; a single individual. 



