540 INSECT A. 



Several Saperdae,with an always long and narrow body, on account 

 of their antennae, which are composed of twelve joints and not of 

 eleven, should also form a particular subgenus(l). 



Of those species considered by all the entomologists of the 

 day a^ Saperdas properly so called, we will cite the two follow- 

 ing: 



S. carcharias; Cerambyx carcharias, h.; Oliv., lb., 68, ii, 22. 

 An inch long, covered with a cinereous-yellow down punctured 

 with black, and the antennae picked in with black and grey. 



Its larva lives in the trunk of the Poplar, and sometimes de- 

 stroys young plantations of that kind of tree. 



S. linearis; Cerambyx linearis, L.; Oliv., lb., ii, 13. About 

 six lines long; very narrow, linear; black; legs short and yellow; 

 elytra punctured in lines and truncated at the extremity. Its 

 larva inhabits the Hazel-tree. 



Other species have been described in which the body is still 

 narrower, and the antennae are excessively long and almost as 

 slender as a hair(2). 



In the fourth and last tribe, that of .the Lepturet^, we 

 find Longicornes in which the eyes are rounded, entire, or 

 scarcely cmarginated, and where, in this case, the antenuse 

 are inserted before, or at most at the anterior extremity of 

 this slight emarginaUon. The head is always inclined poste- 

 riorly behind the eyes in several, or abruptly narrowed at its 

 junction with the thorax, in the manner of a neck ; the thorax 

 is conical or trapezoidal and narrowed before. The elytra 

 become gradually narrower. 



Xhis tribe forms the genus 



- Leptura(3), Lin., 

 With the exception of certain species which belong to the pre- 



(1) The Saperda cardui, asphodeli, suturalis, &c. In some of the preceding spe- 

 cies the eleventh and last joint is somewhat abruptly attenuated, but without 

 being really divided into two. 



(2) See Fabricius, Olivier, Schoenherr, and the Catalogue, Sec, of Count De- 

 jean. 



(3) Or the Sienocorus of the first edition of the llegne Animal, a denomination 

 which I have thought it best to suppress, on account of the confusion resulting 

 from the diflerent applications that have been made of it. 



N.B. Messrs Lepeletier and Serville — Encyc. Method., X, 687 — have placed 

 in this tribe a genus established by them under the name of Ecktptera, which 



