71 
spine. The surface of the thorax is generally smooth on the 
disk, but is in some species slightly uneven. The elytra are 
subtrigonal in shape and depressed as in Alcidion ; the shoulders 
are moderately prominent, and in most species a lateral cariiia 
extends thence towards the apex, but, as in Alcidion, this be- 
comes very obtuse or almost obliterated in some of the species. 
The apex of the elytra is more or less truncated and spined, and 
the centro-basal ridges are always prominent, although uncon- 
nected posteriorly with a dorsal carina, the disk of the elytra 
being always even. The ovipositor is not exserted in the females, 
nor is the apical segment of the abdomen produced. The thighs 
are thickly and abruptly clavate, and the tarsi very moderate 
in length. 
1. Lophopoeum carinatulum, n. sp. 
L. curtulum, minus depressum, postice rotundato-attenuatum, fusco- 
ferrugineum, nigro-fusco maculatum : elytris lateribus hand cari- 
natis, carina centrobasali parum elevata nigro setosa, disco plagis 
tomentosis ochraceis variegato. Long. 3f lin. 
Head rusty brown. Antennse rust-coloured, base of each 
joint (from the third) paler; the basal joint somewhat evenly 
clavate, the upper side being convex, and the lower scarcely 
flexuous, but tubercled at the apex. Thorax rusty brown, varied 
with dingy ochreous ; the lateral spine quite central and acute. 
Elytra less depressed than in allied species, and attenuated 
curvilinearly to the apex, which is briefly and obliquely trun- 
cated, and without acute angles to the truncation : there is no 
lateral carina, and the centro-basal ridge is ■ only moderately 
raised, but is crested with black hairs; the surface is thickly 
punctured, except near the apex, and is without raised lines or 
inequalities, the colour being rusty brown, sprinkled over with 
darker spots, and varied behind the middle with two or three 
linear patches of decumbent hairs of an ochreous hue. The legs 
are rusty brown, with paler rings ; the posterior tarsi, with their 
basal joints, are almost as short relatively as in the genus Lepto^ 
stylus. 
One example ; Ega, Upper Amazons. 
2. Lophopmum fuliginosum, n. sp. 
L. oblongum, depressum, postice angustatum, fuliginosum, cano 
nigroque parce variegatum : elytris apice breviter truncatis, lateri- 
bus obtuse carinatis, carina centrobasali valde elevata et nuda. 
Long. 3 J lin. 
Head dingy brown. Antennse (in d) greatly elongated and, 
towards the apex, fine as a hair, sooty brown, the extreme base 
of each joint (from the third) pallid ; basal joint strongly flexuous 
beneath. Thorax dingy brown, punctured on the disk, which 
