COLEOPTERA. 115 



throughout. Some species are apterous, a character exhibited by no 

 other division of this family. 



This tribe is composed of the genera Lamia and Saperda of Fabri- 

 cius, of some of his Stenocori, and of the Colobothese of Count Dcjean, 

 as well as several of his Cerambyces; but 1 have not yet succeeded in 

 detecting characters which clearly separate the first of these genera 

 from the following one. 



The Cerambyx longimanus of Linnseus and Fabricius belongs 

 neither to this genus nor to that of Prionus, in which it was first 

 placed, but forms a separate one — and such was the opinion of Illiger 

 and Thunberg — of the tribe of the Lamiarise. It is the 



AcROCiNus, Illig. — Macropus, Tliunb. 



It is distinguished from all the Longicornes by the thorax, each side 

 of which is terminated by a moveable tubercle, terminating in a point, 

 or by a spine. The body is flattened, and the thorax transversal; the 

 antennae are long and slender, and the anterior legs longer than the 

 others; the elytra arc truncated at the end, and terminated by two 

 teeth, the exterior of which is the strongest. ■ 



A. longimanus; Cerambyx longimanus, L. ; Oliv., Col. IV, QQ, 

 iii, iv, 12, known by the vulgar name of the Cayenne Harlequin. 

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

 slender. The moveable 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 Avhich it is smooth and cylindrical. 



The first are divided into those that are furnished with wings, and 

 those which are apterous. 



The genus Acanthocinus, Meg. Dej., is formed of a great ruimber 

 of species, mostly from South America, in Avhich the body is propor- 

 tionally shorter, wider, depressed, or but slightly elevated, and the 

 abdomen almost square and hardly longer than it is wide. The legs 

 are robust, and the tarsi strongly dilated. 



There are several species in Europe, one of which, the 



L. cedilis. Fab., brown, with a greyish down, four yellow dots 

 on the thorax, and two blackish bands on the elytra, is remark- 

 able for the length of the antennae of the male, Avhich is quadru- 

 ple that of the bodyf. 

 Next to the Acanthocini should come the genus Tapeina of Messrs. 



* Add Prionus accenti/er, Olivier, 



t For the other species see Catalogue, &c., Dej., p. 106. 



