COLEOPTERA. 499 



Jirrhenodes, 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. de laCordaire, who 

 made a splendid collection of Insects in Brazil, has also informed 

 me that he always found the Brenti under the bark of trees(l). 



Others, similar as to the form of their body, have but nine joints 

 in the antennae, the last of which forms a small club. Such are 

 those which constitute the 



Ulocerus, Schcenh.(2) 

 In the last, or the 



Cylas, Lat. 



The antennae 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(3). 



Sometimes the antennae are distinctly geniculate, the first joint 

 being much longer than the following ones. They form the genus 

 Curculio of Linnaeus. 



We will divide them into the Brevirostres and the Longiroslres, 

 according as the antennae are inserted near the extremity of the pro- 

 boscis, and even with the origin of the mandibles, or further back, 

 either near its middle or close to its base. 



The Brevirostres of this naturalist, according to the system of 

 Fabricius, are divided into two genera. 



Brachycerus. 



Where all the joints of the tarsi are entire and without brush or pel- 

 let beneath. Their short and but slightly geniculate antennae pre- 

 sent externally but nine joints, the last of which forms the club. 

 They are destitute of wings, and their body is very scabrous or 



(1) Lat., Gener. Crust, et Insect., II, p, 244; Oliv.,Ibid., 84; Schoenh., Curcul. 

 Dispos. Method., p. 70. 



(2) Schoenh., Ibid, 75. 



(3) Lat., Ibid, p. 268; Olivier, Ibid, 84, bis. For some other genera derived 

 from Brentis, see the Diet. Class. d'Hist. Nat., article Rhynchophores. 



