base to apex^ and the latter is rather obliquely truncated^ with 
the external angle alone produced into a spine. The scutellum 
is black, with a yellow spot at its tip. The apex of the elytra is 
ashy white, and there is also a white dot on the disk not far 
from the apex. Besides the yellow line on each extending from 
the base to the middle and the sutural streak, there is also a 
yellow dot near the suture, a short distance behind the scutellum. 
The white ring at the base of the sixth antennal joint is obsolete 
in the female. The body beneath is clothed with grey pile, and 
has an ochreous-ashy streak of denser pile on each side. The 
terminal antennal joints are much longer in the male than in 
the female, and there is but little sexual difference in the form 
of the terminal abdominal segment. 
1 met with the species at Ega on the Upper Amazons, and 
not at Para, as erroneously recorded by Mr. Pascoe. 
6. Colohothea dioptica, n. sp. 
C. brevis, lata, convexa, brunnea, supra nullomodo setosa, thorace 
prope basin utrinque tuberculo acuto, delude subiter angustato ; 
elytris pone medium macula rotundata atro-velutina flavo cincta. 
Long. 4| lin. S 2 • 
Head black, vertex grey. Antennae pitchy, bases of the 
middle joints slightly grey. Thorax widened from the front to 
near the hind margins, and each side forming at that point an 
acute prominence, after which it is suddenly narrowed to the 
base ; surface brown, varied with indistinct lighter brown marks. 
Scutellum dark brown, with a central tawny- ashy spot. Elytra 
short, broad, and convex, shoulders forming a short and very 
prominent ridge, the lateral carina proceeding thence being 
scarcely elevated, and disappearing before the middle of the 
elytron ; apex truncated in a slightly flexuous line, sutural angles 
rounded off, external angles produced into a short and broad 
tooth : surface free from setse, brown, speckled with light tawny 
brown, and each elytron having, behind the middle, a large round 
velvety-black spot encircled with yellow. Body beneath black, 
clothed with grey pile; sides of abdomen spotted with grey; 
terminal segment shining black. Legs black or reddish, ringed 
with grey. Fore tarsi simple in both sexes. 
6 . Terminal ventral segment deeply notched ; dorsal broad 
and obtuse. 
2 . Terminal ventral segment simply truncated ; dorsal taper- 
ing and obtuse. 
On slender dead twigs in the forest ; Para and banks of the 
Tapajos. Bare. 
This species seems to resemble much in colours and shape 
