Stnplnjliuidce of the Amazon Vallei/. 287 



Tapajos and Para, t-\vo S , two ? individuals. 



I have also another female fi-om Parii, which has the 

 punctuation of the head coarsei*, and the sides of the cen- 

 tral tooth of the 7th abdominal segment more oblique in 

 direction, so that the tooth is broader at the base ; Avhether 

 this be a distinct species or a mere variety I am unable to 

 decide without an examination of more specimens. 



5. Pcederus protensus, n. sp. Angustulus, rufus, capita 

 piceo, metasterno abdominisque apice fuscis ; femoribus 

 apice nigricantibus, tibiis, tarsis antennarumque articulis 

 4 — 7 infuscatis ; elytris viridi-cyaneis, parallelis, thorace 

 longioribus, crebre fortiter punctatis. Long. corp. 4 lin. 



Antennae 1| lin. in length, slender, yellow, with the 

 middle joints a little infuscate. Palpi yellow ; mandibles 

 red. Head pitchy, shining, rather sparingly and irregularly 

 punctured. Thorax shining red, rather longer than 

 broad, a good deal narrowed behind, very sparingly punc- 

 tured. Scutellum red. Elytra shining bluish-green, 

 ^ lin. in length, narrow and parallel, rather coarsely and 

 deeply punctured, the punctures rather dense. Hind body 

 red, with the apical segments pitchy. INIesosternum, coxiB 

 and femora yellow, the apex of the foiu' hind femora 

 blackish ; the tibife and tarsi infuscate-red, the tarsi 

 slender. 



The male has the usual deep excision on the ventral 

 plate of the 7th segment. In the female this plate ends in 

 a broad triangular projection, and each outer angle forms 

 a short broad tooth. 



Para ; four specimens collected by Mr. Rogers. 



Obs. — This species appears to be closely allied to P. 

 mutans, but is rather narrower and more slenderly formed 

 and has the head darker. It is readily distinguished in 

 the male sex by the structure of the redeagus, which is 

 produced at the extremity into a slender beak-like process. 

 In the female the teeth of the ventral plate of the 7th 

 segment are rather shorter and broader, and so appear less 

 acuminate. 



6. Pcederus amazonicus, n. sp. Eufus, capite nigri- 

 cante subopaco ; elytris cyaneis, thorace longioribus, crebre 

 punctatus ; metasterno, abdominis segmentis ultimis, 

 femorumque apicibus infuscatis. Long. corp. 3^ lin. 



Rather slender and elongate. Antennae long, quite 



