Cerambyx. COLEOPTERA. 6t 



3. Thofe in which the thorax is round, 

 and armed with fixed fpines. 



4. Thofe which have the thorax nearly of 

 a cylindrical form, and unarmed, or 

 without fpines. 



5. Thofe which have the thorax of a 

 roundifh form, refembling a globe 

 flattened or depreffed on the upper fide. 



Scopoli has afiigned the power of emitting a 

 found or noife 5 by the friction of the thorax, 

 where joined to the body, as a character of the 

 Cerambyx ; this vague definition has occafioned 

 his placing feveral of the Linnrean Cerambyces, 

 which want that property, among his Leptune : 

 he makes only tv/o divifions of the remaining 

 Cerambyces, the fir ft containing fuch as have 

 the thorax armed with fpines ; the other, thofe 

 in which that part is unarmed ; this method 

 is more fimple than that of Linnseus, and per- 

 haps as proper, in collections confifling wholly 

 of European infects. 



GeofFroy and Schseffer have formed feveral 

 new genera from the different kinds of Ceram- 

 byces, 



To 



