COLEOPTERA. 533 



In the first place we have those in which no such dissimili- 

 tudes are to be found, their forms and relative proportions 

 being always the same as those of the elytra of the preceding 

 Insects. 



The first genus 



Obrium, Meg. Dej. Callidium, Saperda, Fab. 



Is characterized as follows: the head rounded, and not prolonged 

 anteriorly in the manner of a snout; palpi filiform, the last joint ter- 

 minating in a point; antennae long and setaceous; thorax long, nar- 

 row, almost cylindrical, or forming a truncated oval(l). 

 The second genus 



Rhinotragus, Dalm.(2) 



Differs from the preceding one in the head, which is narrowed and 

 prolonged anteriorly in the manner of a snout; in the palpi of which 

 the last joint is rather thicker than the preceding ones, and truncated 

 at the end; in the antennas, shorter than the body, slightly dilated 

 and somewhat serrated at the extremity; and in the almost orbicular 

 thorax. 



These Insects are evidently allied to those of the following genus; 

 the 



Necydalis, Lin. 



The only one of this tribe in which the elytra are either very short, 

 and squamiform, or prolonged, as usual, to the extremity of the ab- 

 domen, but abruptly contracted a little beyond their origin, then 

 much narrowed, and terminating in a point, or subulate. This is 

 the only point in which these last mentioned Insects resemble the 

 CEdemerae, with which Fabricius has arranged them. The last joint 

 of the palpi is a little longer, and almost obconical and compressed. 

 Their abdomen is long, narrow, contracted, and as if pediculated at 

 base. The wings are folded at their extremity. 



Those species in which the elytra are subulate will form a first 

 subgenus, 



Stenopterus, Illig. 

 From which we might separate various species, foreign to Europe, 



(1) See Catalogue, &.c, of Count Dejean, p. 110. 



(2) Dalm., Insect. Spec. Nov., p. 513. We may also refer to it the Stenopteri 

 luridus, punctatus, albicans, of the Entom. Bras, of Kliig\ 



