StnphijUiiidcc of tlie Amazon Vallpy. 419 



coarsely but quite iudistiuctly puuctured, the vertex with 

 two indistinct elevations. Thorax narroAver than the elytra, 

 rather longer than broad; the sides straight from the front 

 angles till just behind the middle, thence suddenly nar- 

 rowed to the base; the surface dull and velvet-like, with a 

 broad impression along the middle, most distinct on the 

 front part; the lateral ]iortions with coarse, indistinct punc- 

 tures. Elytra longer than the thorax, each with a sharply- 

 defined, longitudinal line down the middle ; the surface 

 dull and quite obsoletely ])unctured. Hind body cylindri- 

 cal, elongate, dull and velvet-like, the basal segments with 

 some coarse rugosities, the apical ones almost without 

 sculpture. Legs pitchy. 



Ega ; a single individual. 



Obs. — A species very closely allied to the above, and 

 apparently as yet undescribed, is not uncommon in Brazil ; 

 it has the antennae shorter, the penultimate joints being 

 transverse, and the thorax has the sides a little rounded 

 near the front angles, 



2. Thoraxopliorus crassus, n. sp. Ferrugineus, opacus, 

 breviusculus; an tennis brevibus,articulis transversis; capitis 

 angulis posterioribus acutis ; prothorace transverse lateri- 

 bus dentatis ; elytris tricostatis ; abdomine conico, segmen- 

 tis longitudinaliter lineato-striatis. Long. corp. 1 lin. 



Antennae short and stout, reddish, basal joint dilated on 

 the inner side, towards the extremity ; 2nd joint short, 

 l)road, bead-like ; 3rd joint rather shorter and narrower 

 than 2nd, 4 — 6 short, similar to one another; 7 — 10 broader 

 than the preceding ones, strongly transverse; 11th short, 

 pointed at apex. Head with the clypeus margined in 

 front, the antenual tubercles joined by a fine curved line 

 parallel Avith the clypeus ; along the middle two strongly 

 raised, longitudinal marks, which are connected in front ; 

 the hind angles projecting and quite acute, the surface 

 depressed between the elevations. Thorax strongly trans- 

 verse, but narrower than the elytra, the front angles pro- 

 minent, the sides with two or three angular projections; 

 along the middle two strongly raised elevations, which are 

 connected in fi-ont, and appear to project over the front 

 margin. Elytra short and broad, longer than the tliorax, 

 each with three elevated longitudinal lines, and the surface 

 betAveen these reticulated. Hind body short, convex, 

 pomted; the segments extremely finely margined at the 



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