2 
COLEOPTERA. 115 
throughout. Some species are apterous, a character exhibited by no 
‘other division of this family. 
This tribe is composed of the genera Lamia and Saperda of Fabri- 
clus, of some of his Stenocori, and of the Colobotheze of Count Dejean, 
as well as several of his Cerambyces; but I have not yet succeeded in 
detecting characters which clearly separate the first of these genera 
from the following one. 
The Cerambyx longimanus of Linnzus and Fabricius belongs 
neither to this genus nor to that of Prionus, in which it was first 
placed, but forms a separate one—and such was the opinion of Illiger 
and Thunberg—of the tribe of the Lamiariz. It is the 
Acrocinus, [lig—Macrorus, Thunb. 
It is distinguished from all the Longicornes by the thorax, each side 
of which is terminated by a moveable tubercle, terminating in a point, 
or byaspine. The body is flattened, and the thorax transversal; the 
antenne are long and slender, and the anterior legs lenger than the 
others; the elytra are truncated at the end, and terminated by two 
teeth, the exterior of which is the strongest. 
A. longimanus; Cerambyx longimanus, L.; Oliv., Col. 1V, 66, 
iil, iv, 12, known by the vulgar name of the Cayenne Harlequin. 
The thighs and tibize of the two anterior legs are very long and 
slender. The moveable tubercles of the thorax are terminated 
by a strong spine, and the elytra are beautifully variegated with 
grey, red, and black *. 
All the remaining Lamiarize compose but the single genus 
Lamia, 
Which we will separate into two sections: those in which the sides of 
the thorax are sometimes tuberculous or rugose, and sometimes 
spinous, and those in which it is smooth and cylindrical. 
The first are divided into those that are furnished with wings, and 
those which are apterous. 
The genus Acanruocinus, Meg. Dej., is formed of a great number 
of species, mostly from South America, in which the body is propor- 
tionally shorter, wider, depressed, or but slightly elevated, and the 
abdomen almost square and hardly longer than it is wide. The legs 
are robust, and the tarsi strongly dilated. 
There are several species in Europe, one of which, the 
L. edilis, Fab., brown, with a greyish down, four yellow dots 
on the thorax, and two blackish bands on the elytra, is remark- 
able for the length of the antennze of the male, which is quadru- 
ple that of the body +. 
Next to the Acanthocini should come the genus Tarra of Messrs. 
* Add Prionus accentifer, Olivier. 
+ For the other species see Catalogue, &c., Dej., p. 106. 
