161 
of alternate joints from the sixth ashy. Thorax chestnut-brown 
or dark brown, with six vittse and the under surface ashy-tawny. 
Elytra rather short, tapering gradually and rather strongly from 
base to apex ; apex sinuate-truncate, external angles spinose ; 
surface dark castaneous brown or blackish brown, the basal and 
apical parts dusted with irregular-sized tawny-ashy specks, 
leaving a broad clear middle space, in the centre of which (on 
each elytron) is a large irregular tawny-ashy spot ; apex with a 
triangular broadish ashy spot. Body beneath clothed with 
tawny-ashy pile. Legs reddish ; tarsi and tibise spotted with 
ashy and black. 
Terminal ventral segment short and broad, each apical 
angle produced into a long, deflexed, horny, hatchet-shapedlobe ; 
dorsal segment narrowed and emarginated at the apex : fore 
tarsi moderately dilated, not fringed ; first joint not broader 
than the second. 
$ . Terminal ventral segment tridentated, middle tooth shorter 
and broader than the outer ones ; dorsal segment narrow and 
obtuse. 
Para and Lower Amazons. 
20. Colohothea sejuncta^ n. sp. 
C. modice elongata, postice attenuata, fnsca ; thorace vittis sex 
cinereo-fulvis ; elytris maculis parvis cinereo-fulvis conspersis, 
singulis spatio magno discoidali fusco maculam majorem cinereo- 
fulvam iiicludente : maris segment© terminal! ventrali obtuso, 
inermi, angulis penicillatis. Long. 4^ lin. d* $ • (3 exempl.) 
Head reddish brown, streaked with tawny, and with two di- 
vergent tawny lines on the crown. Antennae reddish, bases of 
alternate joints from the fourth or sixth ashy. Thorax chestnut- 
brown or darker, with six vittae and the under surface ashy- 
tawny. Elytra rather short and slender, gradually and rather 
strongly tapering from base to apex; apex sinuate-truncate, 
both sutural and external angles spinose, the sutural shorter; 
surface dark castaneous brown, the basal and apical parts sprin- 
kled with irregular- sized tawny-ashy specks, leaving a broad 
clear space on the disk of each, in the centre of whieh is a larger 
irregular tawny-ashy spot ; apex with an ashy margin of regular 
width. Body beneath clothed with tawny-ashy pile. Legs 
reddish ; tibiae and tarsi spotted with ashy and blaek. 
. Terminal abdominal segment rather elongate, thickened 
before the apex ; the ventral plate with obtuse angles, from each 
of which proceeds a line of thick bristles ; dorsal plate simple at 
the apex, and closely applied to the sloping front margin of the 
ventral. Fore tarsi with the first joint greatly dilated. 
R 
