CERAMBYCIDAE. 299 



at the tip; and although he mentions* tliat in some instances 

 this character is jnerely specific or sexual, we cannot avoid be- 

 lieving that thia is the only case in genera, like Sphajnolliecns, 

 composed of heterogeneous material. However this niav prove 

 on more extended obsei'vation, the group as here defined ccjntaiiis 

 all tiiose genera in our fauna in which the eyes are linelv granu- 

 lated, deeply emarginate, with the upper lobe wide; the sculelluni 

 acute, but not very large, though sometimes elongate; and the 

 prothorax not distinctly lobed, but only feebly bisinuatc or trun- 

 cate at base. The antennae are more slender than in Trachyderes, 

 and the poriferous system is much less distinct, or even obsolete, 

 though in Stenaspis it is still quite obvious, and the joints are 

 carinate and bisulcate. Jn Batyle the last joint of the palpi 

 (which is subcylindrical and truncate) is very feebly impressed. 



The antennal tubercles are either much elevated, leaving a 

 concavity between them, or scarcely elevated, in which case the 

 vertex is nearly flat; the front in the former is very large, square, 

 and perpendicular, and the genaj are long; in the latter the tid)er- 

 cles are less elevated, the front is moderate, declivous, and the 

 geme usually short. 



They may be thus tabulated : — 



A. Front large, square, perpendicular, abruptly separated from the ante- 



ocular spaces ; 

 Prosternum vertical behind. Stenaspis. 



. Prosternum arcuate at tip ; 



Elytra distinctly margined at the sides. Crioprosopus. 



Elytra not or obtusely margined ; 



Prothorax armed with a lateral spine ; mesosternum not pro- 

 tuberant ; 

 Body pubescent. Tragidion. 



Body glabrous. Purpuric enus. 



Prothorax rounded, convex. Aethecerus. 



B. Front moderate, short, declivous, not abruptly defined each side ; 



Two ivory vittse on each elytron (protliorax margined at apex) ; 



Mesosternum declivous. Mannophorus. 



One ivory vitta on each elytron (prothorax not margined at ai)fx) ; 



Mesosternum protuberant. Entomosterna. 



Elytra without ivory vittse ; mesosternum declivous ; 



Body pubescent, prothorax not margined at apex. Amannus. 



Body pilose, prothorax margined at apex. Batyle. 



Of the throe ppecies of Tragidion, two have the elytra sulcato, 

 while T. armatum has thera even : there is also a dilference iu 



* Gen. Col. ix. 1G7, note 1. 



