190 
6. Oncideres dignus, n. sp. 
O. cylindricus, fuscus ; thorace tuberculis quinque in linea trans- 
versa ordinatis ; elytris prope basin tuberculis inagnis globosis 
utriiique sex nigris, postice guttis numerosis albis. Long. 10 lin. . 
Head ( ^ ) moderately narrow ; forehead very narrow, being- 
encroached upon by the voluminous eyes, which are oblong and 
reach very nearly to the extremity of the muzzle ; antenniferous 
tubercles unarmed; colour dark brown. Antennse nearly twice 
the length of the body, black, basal joint gradually thickened 
from base to apex, rest of the antennje tapering to the tip. 
Thorax longer and narrower than in the typical species of Onci- 
deres ; lateral tubercles small, obtuse, and black ; in a line with 
them is a row of five similar glossy-black tubercles lying across 
the middle of the thorax; colour dark brown. Elytra cylin- 
drical, clear dark brown, impunctate; middle of base with six 
very prominent glossy-black tubercles, arranged in two rows ; 
besides these, there are ten or twelve smaller tubercles on each 
side, three of which are on the shoulder : the rest of the elytra 
smooth, and ornamented with a number of small clear white 
spots, distributed regularly and widely apart over the surface. 
Body beneath and legs dark brown. 
This handsome species was very rare, at Ega, Upper Amazons. 
7. Oncideres pulchellus, n. sp. 
O. minor, cylindricus, griseo-brunneus ; elytris cinereo maculatis, 
dimidio basali tuberculis rotundatis, dimidio apicali maculis irn- 
pressis, nigro-nitidis. Long. lin. $ . 
Head and thorax of same breadth ; head ashy brown, with a 
streak down each side of the front tawny ; buccal organs and 
circuit of the mouth red. Antennse a little longer than the 
body, dark brown. Thorax ashy brown, with three shining- 
black tubercles in a triangle on the disk, and two smaller ones 
on each side, the outermost of which is in the position of the 
ordinary lateral tubercle. Elytra cylindrical, obtuse behind, 
ashy brown, varied with a small number of equal-sized and equi- 
distant pale ashy spots, and with a number of scattered shining- 
round spots, those over the basal half covering large rounded 
tubercles of small elevation, and those towards the apex shallow 
impressions; the tubercles are not crowded near the base or 
shoulders, but are widely dispersed. Body beneath and legs 
light brown ; sides of breast with an ashy patch. 
Ega; rare. 
8. Oncideres Cephalotes, n. sp. 
O. magnus, robustus, convexus, postice atteimatus, cinereo-brunneus ; 
elytris prope basin dense, pone basin sparsim tuberculatis, tuber- 
