COLEOPTERA. 387 



A. longimanus; known by the vulgar name of the Cayenne Harlequin. The 

 thighs and tibiae of the two anterior legs are very long and slender. The 

 inoveable tubercles of the thorax are terminated by a strong spine, and the 

 elytra are beautifully variegated with grey, red, and black. 



All the remaining Lamiarise compose but the single genus 



LAMIA, 



Which we will separate into two sections; those in which the sides of the 

 thorax are sometimes tuberculous or rugose and sometimes spinous, and those 

 in which it is smooth and cylindrical. 



They are arranged under various subgenera, such as Acanthocinus, Tetraopes, 

 Mnnochamus, Saperda, &c. 



In the fourth and last tribe, that of the LEPTURET^B, we find Longicornes in 

 which the eyes are rounded, entire, or scarcely emarginated, and where, in this 

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

 this slight emargination. The head is always inclined posteriorly 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. 



This tribe forms the genus 



LEPTURA, Linnceus, 



With the exception of certain species which belong to the preceding tribes and 

 to the Donaciae. In Leptura Proper the head is abruptly narrowed immediately 

 behind the eyes. The antennae, inserted near the anterior extremity of their 

 internal emargination, are remote at base. The two eminences from which 

 they rise are almost confounded in one plane. The thorax is almost always 

 smooth or without lateral tubercles. 



FAMILY V. 



EUPODA. 



OUR fifth family of the tetramerous Coleoptera is composed of insects, the 

 first of which so closely approach the last Longicornes that they were con- 

 founded both by Linnaeus and Geoffroy, and the last are so closely allied to the 

 Chrysomela?, the type of the following family, that the first of those naturalists 

 places them in that genus. The organs of manducation present the same 

 affinities. Thus in the first, the ligula is membranous, bifid or bilobate, as in 

 the Longicornes; their maxillse also greatly resemble those of those latter; but 

 in the last this ligula is almost square or rounded, and analogous to that of the 

 Cyclica. 



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