104 INSECTA, 
an abrupt contraction of its diameter, forming a kind of neck; in 
several it is vertical. 
In some, the last joint of the palpi is sometimes almost in the form 
of a cone or reversed triangle, and sometimes nearly cylindrical and 
truncated at the extremity. The lobe terminating the maxille is 
straight, and not curved on the inner one at its end. The head 
usually projects, or is simply inclined, and in those, where, by a very 
rare exception—the Dorcaceri—it is vertical, its width is nearly 
equal to that of the body, and the antennz are very remote at base, 
and spinous. The thorax, frequently unequal or square, is rarely 
cylindrical, 
These Longicornes are subdivided into two principal sections or 
small tribes. 
1. The Prionu, characterized as follows : the labrum null, or very 
small and indistinct ; the mandibles stout, or even very large, particu- 
larly in most of the males; theinternal lobe of the maxille null, or very 
small; the antennz inserted near the base of the mandibles or the 
emargination of the eyes, but not surrounded by the latter at base ; 
the tho1ax most frequently trapezoidal or square, crenated or dentated 
laterally. 
The first genus, or 
Paranpra, Lat.—Arrevasus, De Geer,—Ternesrio, L’ab., 
Where, as in the following, the antenne are simple, almost granose, 
compressed, of equal thickness throughout, and as long as the thorax 
at most, and the terminal lobe of the maxille is very small, scarcely 
reaching to the extremity of the first joint of the palpi, is distin- 
guished from that genus*, as well as from all others of the same 
family, by its corneous ligula, which is in the form of the segment 
of a very short transversal circle, without emargination or lobes, 
and by its tarsi, the penultimate joint of which is slightly bilobate, 
and the last, much longer than the preceding ones taken together, 
presents between its hooks a little appendage with two terminal 
sete. The body is a parallelopiped, and depressed, and the thorax 
square, rounded at the posterior angles, and without spines or teeth. 
These Insects are peculiar to America ft. 
Sponpy is, Hab.—AtTTELABUS, Lin.—CrramByx, De Geer. 
The Spondyles, which approximate to the Parandree in their antennze 
and the exiguity of their maxillary lobes, are removed from them by 
their ligula; the latter, as in all the following Longicornes, is mem- 
branous and cordiform. They also differ in the tarsi; the penul- 
timate joint is deeply bilobate, and the last is not longer than the 
* The mandibles of the Spondyles and Parandre are, at most, as long as the 
head, triangular or conical and arcuated at the end. 
+ See Lat., Gener. Crust. et Insect., Ill, 28, and I, ix, 7; Schcenh., Synon. 
sect., I, iii, p. 334, and App., p. 145, and Encyc, Méthod., article Parandre. 
