100 
dorsal plate acute lanceolate, ventral truncated. Mesosternum 
in the d plane, in the 2 tumid, as in Trypanidius. 
The only species which I have at present seen belonging to 
this genus has the bulk and general form of the Trypanidii ; but 
it differs from them by the presence of crested centro-basal 
tubercles on the elytra, and by the absence of tubercles on the 
mesosternum in the male sex. 
Chatanes setiger^ n. sp. 
C. oblongo-ovatus, fuscus, fulvo cinereoque varius : antennis pedibus- 
que squamis cinereis sparsis ; elytris apice utrinque macula tri- 
angulari nigra velutina liturisque cinereis. Long. 5-6^ lin. <S $ . 
Head dull black, sprinkled with tawny-coloured hair-scales, 
Antennse scarcely one and a half times the length of the body, 
even in the males, dull black, sprinkled with minute ash-coloured 
hair-scales; the bases of the joints (from the fourth) ashy; 
sparingly setose beneath, the second joint having a little tuft of 
stiff hairs. Thorax moderately convex, widened from the front 
to the bases of the lateral spines, which are small and acute, and 
placed at a short distance from the hind angles; the surface dull 
black, variegated with tawny ; sides (below the spines) ashy- 
tawny, sprinkled with black. Elytra oblong oval, briefly and 
rather obliquely truncated at the apex, moderately convex ; sur- 
face densely clothed with short, erect, black bristles, some of 
which arise from a little tuft of shorter bristles; moderately 
punctured ; centro-basal tubercles surmounted each by a rather 
long pencil of hairs : the colour is blackish brown, with a few 
tawny specks ; behind the middle is a short transverse ash- 
coloured line crossing the suture (in some examples almost 
obliterated), and close to the apex on each side is a triangular 
velvety-black spot, notched on its inner side and margined with 
ashy, the sutural space between the spots being sometimes 
wholly ash-coloured. Body beneath and legs tawny ashy, 
sprinkled with black ; middle of abdomen black, with edges of 
segments tawny. The legs are stout ; the thighs clavate, the 
basal joint of the tarsi fully equal in length to the two following- 
taken together. 
S The apical ventral segment in the male is semicircularly 
notched, the dorsal segment briefly and obtusely notched. 
$ The apical dorsal segment in the female is much elongated, 
lanceolate and acute, but not keeled above ; the ventral segment 
semitubular and truncated at the tip, 
Ega and S. Paulo, Upper Amazons, on dead branches in the 
forest. I have a specimen also from the interior of French 
Guiana, collected by M. Bar. 
