Stuphj/linidce of the Amazon Vallci/. 249 



1. ScopcBus tarsalis, n. sp. llufesceus, sat nitidus, 

 parcius obsolete punctatus, elytris fusco-rufis ; protliorace 

 lato, obsolete punctato, medio canalicula brevissima; 

 abdomine basi angustato, subtilissime punctato ; tarsis 

 brevibus, validis. Long. corp. 1§ lin. 



$. Antennae elongate, longer than head and thorax, 

 reddish-yellow; 1st joint rather stouter than those follow- 

 ing, quite as long as 2nd and 3rd together, 3rd joint a 

 little shorter than 2nd, 4 — 10 each slightly shorter but not 

 broader than its predecessor ; 1 1th joint acutely pointed, a 

 little longer than 10th. Labrum with four almost equi- 

 distant teeth in front, a little emarginate between the two 

 middle ones. Mandibles each with three acute teeth in 

 the middle. Head dark reddish, very finely and indis- 

 tinctly punctured, about as broad as the elytra ; the ex- 

 treme vertex in the middle with a short, deep, fovea-like 

 channel, and on eitlier side slightly emarginate ; the front 

 part of the head with two large, ill-defined elevations. 

 Thorax distinctly narrower than the elytra, the greatest 

 Avidth about one-fifth from the front, fit-om thence abruptly 

 narrowed to the neck, and slightly narrowed towards the 

 rounded base ; extremely finely and indistinctly punctured, 

 shining, in the middle with a short impression. Elytra 

 a little longer than the thorax, infuscate-red, distinctly 

 impressed at the scutellum, extremely finely and in- 

 distinctly, and not densely punctured, a little shining. 

 Hind body reddish-yellow, distinctly dilated towards the 

 extremity, densely, very finely and indistinctly punctured. 

 Legs yellow ; tarsi short and stout, the front pair very 

 bi'oad. 



In the male, segments 2 — 5 of the hind body are on the 

 vmderside distinctly impressed in the middle, the 6th seg- 

 ment is nearly simple, the 7th has a deep narrow notch; 

 and it is probable that the elevations on the front of the 

 head arc peculiar to the male sex. 



Tapajos ; a single individual. 



2. Scopceus ornatus, n. sp. Dense, subtilissime punc- 

 tatus, opacus, rufescens ; pcdibus testaceis ; antennis 

 articidis quatuor ultimis albidis ; elytris fuscis, apice tes- 

 taceis ; abdomine lato, basi angustato, apicem versus in- 

 fuscato. Long. corp. 1§ lin. 



Antennfe about as long as head and thorax, reddish, 

 with the four apical joints white; 1st joint distinctly 



