COLEOPTERA «» 



origin of the mandibles, and frequently near the middle of the probos- 

 cis, which is usually lonoc., comprise, with some exceptions, the genus 

 Lixus, Rhynclicenus, and Calandra of Fabricius. 



lu the two first the antcnnre present ten joints at least, but most 

 commonly eleven or twelve, of which the three last at least form the 

 club. 



Lixis, Fab. 



The Lixi almost resemble the Cleoni in their organs of manducation, 

 as well as in the elongated fusiform club of their antennse, the narrow 

 and elongated figure of their body, and the armature of their tibisE. 

 The L. parapleclicus, whose larva lives in the stem of the Phellan- 

 driam and produces in Horses which swallow it with the plant the 

 disease called paraplegia, is almost linear. Another species, for which 

 a particular genus — Rhinocillus — has been formed on account of its 

 having but very slightly geniculate antennae, is reputed an odon- 

 talgic *. 



Rhyncflenus, Fah. 



The Rhynch?eni present no such ensemble of characters. 



Sometimes the legs are contiguous at base, and there is no sternal 

 fossula for the reception of the proboscis. 



Some never leap, and their attennee are composed of eleven or 

 twelve joints. These are winged. 



Tamxophilus. 



The tamnophili, in which the antennae are but slightly geniculate, 

 short, composed of twelve joints terminated by an oval club, and. 

 placed on a short, projecting, and but slightly arcuated proboscis, 

 where the eyes are approximated superiorly, the extremity of the 

 abdomen is exposed, and the tibiae are armed at the extremity with 

 a stout hook, Avill form this first subgenus, which we must distin- 

 guish from that of Rhinus (Bhine), with which Olivier and myself 

 confounded it f . 



Other Rhynchaeni are remarkable for their arcuated tibiae, fur- 

 nished with a stout hook at the end ; their tarsi are long, filiform, 

 but scantily provided with hair beneath, and the penultimate joint 

 is but very little dilated and simply cordiform. They will compose 

 the subgenus 



Bagous. 



Small Insects which are found in marshes |. 



Some others with the same habits are removed from their conge- 

 ners by their tarsi, of which the penultimate joint completely encloses 

 the last between its lobes. The last one is frequently destitute of 

 hooks. They will be comprised in the subgenus 



* The genera Rhinocillus, Lachnaus, Nerthops, Larinus, Lixus, Pacholenus of Sclioen- 

 lierr. Tlie sexual organs of the Lixi presented characters to M. Dufour not ob- 

 served by him ia any other Colcoptera. 



t The genera Ltemosaceus, Tamnophilus, of the same. 



I The genera, Bugoits, Hi/dr-onomus, Lyprus, of the same. 



VOL. IV. H 



