292 Mr. H. W. Bates on Cemmbycidce 
side, and the dilatation of the cheeks behind the eyes, offers 
all the other characters of the Ihidiince. The thorax 
is more narrowed anteriorly than in most other species, 
and is constricted there, as well as near the hind margin. 
The antenniferous tubercles are obtuse, but the specimen 
is a $ . 
Hah, — Tapajos. 
4. Octoplon unoculum, n. sp. 
Cylindricum, longe pilosum, nigrum, nitidum j thorace 
flavo-griseo-pubescente, tuberculo discoidali nigro ni- 
tido ; elytris postice valde convexis, ante medium fascia 
interrupta alba, dimidio apicali flavo-griseo-pubescente, 
antice albo-marginato, sparse punctatis, apice truncatis, 
extus breviter spinosis, spina alba; femoribus piceo-rufis, 
posticis elytris longioribus, apice distincte bispinosis ; an- 
tennis piceo-rufls, articulis 2 basalibus nigris, reliquis 
apice fuscis. 
Long. 5i lin. $ . 
An elegant species, of cylindrical from, distinguished 
by the single glossy black tubercle on the disc of the 
pubescent griseous thorax, and also by the convex pos- 
terior part of the elytra. The basal half of the elytra 
is glossy black, with very few punctures, and ornamented 
at about the third of the elytral length by a whitish belt, 
broadest on the lateral margin, and disappearing before 
reaching the suture ; the apical half is covered with a 
dense griseous pubescence like that of the thorax, the 
anterior margin of this is advanced and rounded on the 
suture, and is there edged with whitish, which forms an 
indistinct, oblique, and entire fascia. The antenna3 and 
tibias are carinate, and the hinder femora are nearly linear 
with distinct apical subequal spines. 
Hah. — Kiver Tapajos. 
5. Octoplon striatocolle. 
Ihidion striatocolle, White, Cat. Longic. Brit. Mus. 
p. 224. 
Elongatum, minus convexum, breviter sparse setosum, 
nigrum, nitidum ; thorace insequali, transverse forte rugato. 
