68 
versus cinereo strigosis, apice breviter oblique sinuato-truncatis. 
Long. 3^ lin. 
Head dusky ; antennae testaceous brown, apices of the joints 
from the third black, basal joint waved beneath. Thorax tawny 
brown ; disk with two round blackish spots, sometimes wanting. 
Elytra gradually narrowed from shoulders to apex, which latter 
is very obliquely sinuate-truncate ; the sides acutely carinated 
from the shoulder, the carina effaced before the apex ; surface 
even and punctured, the centro-basal ridge extremely prominent 
and destitute of hairs : the colour is tawny brownish, with a very 
indistinct, waved, ash-coloured fascia across the middle, the 
apical part being silky brownish, streaked with ashy. Beneath 
and legs testaceous brown ; base and apex of tibise and middle 
joints of tarsi blackish. 
Var. Paraense, rather more robust ; the surface and sides of 
elytra more thickly punctured, and the apex simply truncated, 
without sinuation. 
This was rather a common insect at Ega, on dead twigs. The 
variety was found at Para. 
3. Alcidion latipenne, n. sp. 
A. crassum, postice modice attenuatum, apice transverse sinuato- 
truncatum : elytris humeris valde productis lateribusque carinatis. 
Long. 4-6 lin. $ S . 
Head dusky ; antennse testaceous brown ; base of all the joints 
from the third pallid. Thorax much broader than long, surface 
uneven, tawny brown, silky, with a V-shaped dusky mark be- 
hind, joining two dusky spots on the sides of the scutellum. 
Elytra very broad and convex at the base, gradually narrowed 
to the apex, which is broadly and transversely sinuate-truncate, 
with the external angles somewhat produced ; the shoulders are 
very prominent, and from the acute edge of each commences the 
lateral carina, which extends nearly to the apex ; the surface is 
even and moderately punctured, the colour being reddish or 
tawny brown, slightly streaked here and there with ashy, espe- 
cially in the middle, and having rows of small dusky specks, a 
large violet-brown spot lying on the defiexed margin beneath 
the shoulders. Beneath and legs testaceous brown. 
Ega, and on the banks of the Cupari, a branch of the Tapajos. 
4. Alcidion interrogationis, n. sp. 
A. valde elongatum, postice parum attenuatum, carneo-griseum seri- 
ceum : elytris apice longe mucronatis, litura nigra signum interro- 
gationis simulante ornatis. Long. 5^ lin. 
Head brown; antennse dusky, base of joints from the third 
pallid, the first joint strongly waved. Thorax tawny, sides 
