of the Amazon Valley. ~ ~~ 51 
. convexo, leevi, spinis lateralibus brevibus conicis mox pone medium 
_ sitis: elytris granulato-punctatis, lineis interruptis cinereis apice 
peroblique truncatis, angulis interioribus obtusis, externis sub- 
acutis. Long. 33 lin. ¢ Q. 
Head dusky. Antenne 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 ¢, more ovate in the 9, 
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. 
d The apical abdominal segment in the ¢ 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. 
O. ellipticus, flavo-testaceus: elytris cinereis, utrinque nigro decem- 
maculatis. Long.43lin. ¢. 
Head testaceous yellow, with golden-yellow pile. Antenne 
black, with three white rings, sparingly clothed with long sete. 
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 
set 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 (¢) rounded and closely applied to the ventral plate, 
which is truncated and strongly bidentate. 
4-* 
