COLEOPTERA. 505 



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

 fossula for the reception of the proboscis. 



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

 twelve joints. These are winged. 



Tamnophilus. 



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, will form this first subgenus, which we must distin- 

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

 confounded it(l). 



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 hairs 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(2). 



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

 ners by their tarsi, of which the penultimate joint completely en- 

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

 of hooks. They will be comprised in the subgenus 



Brachypus(S). 

 In that of 



Balaninus, 



We find very singular Rhynchophoraj their proboscis is at least as 

 long as the body, and sometimes much longer. The larva of one 

 species Bhynchasnus nucum, Fab. feeds on the filbert(4). That of 



Rhynch;enus proper 

 Only differs from the preceding subgenera in negative characters, 



(1) The genera Lasmosaccus, Tamnophilus of the same. 



(2) The genera Bagous, Hydronomus, Lyprus, of the same. 



(3) The genera Brachypus, Brachonyx, Tanysphyrus, Jinoplus, of Schoenherr. 



(4) The genera Balaninus, Antliurlrinus, Erodiscus, of the same. 



Vol. Ill 3 O 



