11 
one longitudinal behind. Elytra tapering slightly from base 
to apex, the tips rather obliquely and briefly truncated, the 
external angles of the truncature slightly produced ; the basal 
half studded with acute granulations accompanied by punctures, 
and in the centre of each, near the base, is a large, obtuse, 
transverse elevation, dark brown in colour: they are clothed 
with fine silky changeable olive-grey pile, and are variegated 
from the middle to the apex with fine grey and fuscous strongly 
undulating lines, with a grey patch on each side near the 
middle spotted with black. Umler-surface of the body clothed 
with golden-grey pile. Legs greyish olive, with paler rings. 
One individual, taken at Ega. This and the following species 
resemble much in colour and design Acrocinus trochlearis and 
accentifer. 
2. Oreodera fluctuosay 
O. elongata, depressa, tomento tenuissimo holosericeo cinereo vestita : 
elytris apicibus oblique truncatis et spinosis, plaga laterali pone 
basin, strigisque undulatis numerosis fuscis. Long. 10 lin. $ . 
Head and thorax grey : eyes nearly touching the central 
furrow on the vertex. Antennse grey, apex of each joint from 
the third dusky. Thorax with the two anterior discoidal tubercles 
very prominent, the posterior one nearly obsolete. Elytra 
slightly tapering, the tips rather obliquely truncated, the ex- 
ternal angles produced, dentiform ; in the middle, near the base, 
each has a large prominent dark-brown tubercle ; the basal half 
is somewhat sparingly granulate-punctate : ashy grey in colour ; 
across, near the base, is a broad yellowish- grey belt, and on the 
margins behind the shoulders a long oblique dark-brown patch ; 
there are also two transverse, narrow, strongly undulated belts 
of the same dark-brown colour, — one behind the middle, the 
other near the apex. Legs grey, femora varied with dusky; 
two rings on the tibise and claw-joint of the tarsi black. Under- 
surface of the body densely clothed with a golden-grey pile. 
One example, taken at Para. I believe it is also found at 
Cayenne. 
3. Oreodera glauca^ Linn. 
Cerambyx glaucus, Linn. Syst. Nat. ii. 626. 28. 
Lamia glauca^ Fab. Ent. Syst. ii. 274. 27. 
Spengleri, Fab. Ent. Syst. ii. 291. 93. 
This is a very common insect throughout the Amazon region 
as well as at Cayenne. It is found on the trunks of felled trees 
of one or more species of Inga^ the bark of which it resembles in 
colour. The lateral tubercles of the thorax have indications of 
the same impressed line around them which is so strongly 
marked in the Acrocini. In the 6 the fore legs are elongated ; 
the tibise bent, rather hooked at the apex on the inner side. 
c 2 
