of the Amazon Valley. 45 
the centro-basal ridges, which are slightly elevated, but crested 
with black hairs; the basal part only of the elytra is punctured; 
the colour is reddish brown, with a light grey tinge near the 
middle and apex, and a number of small blackish spots, besides 
a short vitta, on the disk of each behind the middle, which has 
at each end a whitish spot. Body beneath pale reddish, clothed 
with ashy-brown tomentum ; legs reddish, ringed with ashy and 
black. . 
Taken at Ega, on dead branches. 
Genus CHZTANES, noy. gen. 
Body oblong, convex, setose. Antenne one and a half times 
the length of the body, stout, furnished with a few sete beneath. 
Thorax rather narrow, widening slightly from the front; lateral 
spines distinct, acute, standing out from the sides, and placed at 
a distance from the hind angles. LElytra with centro-basal 
tubercles, surmounted each by a crest of hairs; the rest of the 
surface hispid, with tufts of short bristles and longer sete ; 
truncated at the tip. Legs stout; thighs abruptly clavate ; 
basal joint of tarsi equal in length to the second and third taken 
together. Apical abdominal segment in the males with both 
dorsal and ventral plates deeply notched, the angles of the ven- 
tral plate produced into spines: ovipositor elongated in the @ ; 
dorsal plate acute lanceolate, ventral truncated. Mesosternum 
in the ¢ plane, in the 2 tumid, as in Trypanidius. 
The only species which I have at present scen 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. 
Chetanes setiger, 1. 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. ¢ Q. 
Head dull black, sprinkled with tawny-coloured hair-scales. 
Antenne 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- 
