of the Amazon Valley. 51 



convexo, Isevi, spinis lateralibus brevibus conicis mox pone medium 

 sitis: elytris granulato-punctatis, lineis interruptis cinereis apice 

 peroblique truncatis, angulis interioribus obtusis, externis sub- 

 acutis. Long. 3^ lin. S $ • 



Head dusky. Antennae reddish, with a few short stiff hairs 

 both above and beneath the joints, especially at their apices. 

 Thorax convex, smooth, reddish brown, sometimes with a faint 

 ashy vitta on each side, the lateral spines forming simply conical 

 protuberances on the sides, a little behind the middle. Elytra 

 strongly narrowed posteriorly in the S , more ovate in the $ , 

 obliquely and obtusely truncated at the tips ; surface with nu- 

 merous punctures, each surmounted by a raised point, dull red- 

 dish or dark brown, with scanty ashy pubescence arranged 

 partly in interrupted lines. Body beneath and legs dull reddish 

 brown or blackish, shining, scantily clothed with ashy pile ; legs 

 hirsute; basal joint of the hind tarsi as long as the three re- 

 maining joints taken together. 



6 The apical abdominal segment in the 6 is greatly elongated, 

 at least the ventral plate, with the angles of the apex acute ; the 

 dorsal plate is much shorter and deeply notched. 



? The ovipositor projects beyond the tips of the elytra; 

 apical dorsal plate with raised margins and a sharp keel running 

 into a prolonged point. 



Para and Santarem, on slender dead branches. 



2. Oxathres Erotyloides, n. sp. 



0. ellipticus, flavo-testaceus : elytris cinereis, utrinque nigro decem- 



maculatis. Long. 4| lin. S • 



Head testaceous yellow, with golden-yellow pile. Antennae 

 black, with three white rings, sparingly clothed with long setae. 

 Thorax small, yellow-testaceous ; lateral spines forming simply 

 conical protuberances on the sides, a little behind the middle. 

 Elytra of equal breadth to about three-fourths of their length, 

 thence rapidly narrowing to their tips, which latter are briefly 

 and rather obliquely truncated, the sutural angle of the trunca- 

 ture rounded off, the external one produced into a short blunt 

 tooth directed outwards; surface densely clothed with dusky 

 setae and punctured, with an obtuse smooth posterior carina on 

 each side running into the apical tooth. The colour is ashy, 

 with, on each elytron, ten rounded black spots — namely, three 

 on the margin near the shoulders, four in a line parallel to 

 and near the suture, and three on the disk. Body beneath and 

 legs yellow-testaceous ; basal joint of tarsi equal in length to 

 the two following taken together. Apical dorsal plate of the 

 abdomen ( 6 ) rounded and closely applied to the ventral plate, 

 which is truncated and strongly bidentate. 



4* 



