84 INSECTA, 
Tusicenus, Dej.—Av.eres, Schenh., 
Where they also terminate in a club, but it is perfoliate, and the 
joints are nearly of a similar length or differ but little. The abdo- 
men also forms a long square, and not an oval, like that of Eur- 
hinus *. 
Those, in which the antenne are filiform, or where the last joint 
alone forms the club; where the proboscis, frequently longer in the 
males than in the females, and often differently terminated, always 
projects forwards; in which all the other parts of the body are 
usually much elongated, and the penultimate joint of the tarsi is 
bilobate, form the genus 
Brentus, Fab.—Curcutio, Lin. 
These Insects are peculiar to hot climates. 
In some the body is linear, and the antenne, filiform or slightly 
enlarged towards the extremity, are composed of eleven joints. 
They constitute the genus 
Brenvtus properly so called. 
M. Steven has separated from them, under the generic name of 
Arrhenodes, those species in which the head is as if cut behind the 
eyes, where the snout is short and terminated by two narrow and 
projecting mandibles in the males. All the Brenti of North Ame- 
rica, and the only species found in Europe—the B. italica—belong 
to this group. The latter, according to the observations communi- 
cated to me by M. Savi, Jun., professor of Zoology and Mineralogy 
at Pisa, is always found under the bark of trees and in the midst of 
certain Ants which have a similar domicil. M. dela Cordaire, who 
made a splendid collection of Insects in Brazil, has also informed me 
that he always found the Brenti under the bark of trees f. 
Others, similar as to the form of their body, have but nine joints 
in the antenne, the last of which forms a small club. ‘Such are 
those which constitute the 
Uxocerus, Schenh. t 
In the last, or the 
Cyruas, Lat. 
The antennee are composed of ten joints, the last of which forms 
an oval club. The thorax is as if divided into two knots, the pos- 
terior, or that which forms the pedicle, being the smallest. The ab- 
domen is oval §. 
Sometimes the antennz are distinctly geniculate, the first joint 
* Schenh., Circul. Dispos. Méthod., 46; Dej., Catalogue, &c. 
+ Lat., Gener. Crust. et Insect. II, p. 244; Oliv., Ibid., 84; Scheenh., Curcul. 
Dispos. Méthod., p. 70. 
t+ Scheenh., Ibid, 75. 
§ Lat., Ibid, p. 268; Olivier, [bid, 84, bis. For some other genera derived from 
Brentis,see the Dict. Class. d’Hist. Nat., article Rhynchophores. 
