COLEOPTERA. 54/ 



Certallum, Dej., has the head at least as broad as the thorax, which is cylindrical, or slig-litly dilated in the 

 middle. Type, C. ruficoUe, Fabr. [a French species]. 



Clytus, Fab., Las the head narrower than the thorax, nearly globular. Clytus areuatus, [a rare British species, 

 and others]. 



Callidium, has the thorax in like manner broader than the head, flattened, and orbicular. [Callid. Bajulum, a 

 very common insect, very destructive to wooden posts and rails.] 



We terminate this tribe by insects which, in respect to the palpi, the form of the head, thorax, and 

 elytra, as well as their respective proportions, offer various exceptions or anomcilies, commencing with 

 those in which the thorax has a form analogous to that of Certallum. It is of the breadth of the head 

 and of that of the base of the elytra, or scarcely narrower, and either subcylindrical, round, or orbicular, 

 and is broader towards the middle. All the thighs are clavate, and placed upon a suddenly formed 

 slender and elongated pedicle. The elytra in the majority are either very short, or suddenly narrowed 

 at a short distance from the base, and then subulated. Those of the first groups however do not exhibit 

 such diversity in the elytra. 



Obrium, Meg., has the head rounded, and not prolonged in front into a muzzle ; the palpi with the last joint 

 thickened, and truncate at the tip ; antenna; shorter than the body, and thorax long and narrow. 



Rhinotragus, Germ., has the head produced into a muzzle ; the thorax suborbicular. They evidently approach 

 the next subgenus. 



Necydalis,\Anii., aretheonly species which have the elytra contracted into a pair of very short scales, or extended 

 to the tip of the abdomen, but narrowed suddenly at a little distance from the base, thus (alone) resembling ffide- 

 mera ; the abdomen is long and narrow, and apparently pedunculated at the base. Tlie species with subulated 

 elytra compose the subgenus Stenopterus, (S. rufn, Linn.) [a reputed British species.] Those with very short, 

 scalelike elytra form the subgenus Necydalis proper, or Molorchus, Fab. Type, N. major, Linn, [a rare British 

 species, figured by Curtis]. 



Certain species, for the most part peculiar to the African islands, New Holland, New Ireland, and 

 New Zealand, anomalous in several respects, and which in a natural order ought probably to be 

 placed between the Lamiarise and Leptureta;, will terminate the division of the Cerambycini. These 

 have the palpi nearly filiform, with the last joint subcylindrical, slightly narrowed towards the base ; 

 the thorax mostly smooth, or slightly unequal, without acute tubercles, dilated from the front to the 

 hind part, trapeziform or truncate conical, as in the last tribe of this family ; the abdomen is nearly 

 in form of a reversed triangle in many, and the elytra are truncate. 



Distichocera, Kirby, has the male antennae dilated to the tip, and with furcate joints. [New Holland.] 



Tmesisternus, Latr., has simple setaceous antennae, longer than the body ; the thorax is lobed behind, prester- 

 num prolonged behind, truncate, and received into a notch of the mesothorax. (Undescribed species, from New 

 Ireland.) 



Tragocerus, Dej., has not the presternum produced; the antennae filiform, and rather shorter than the body, sub- 

 serrated ; thorax unequal, and elytra oblong. 



Leptocerus, which have not the prosternum produced behind ; antennae setaceous, much longer than the body, 

 especially in the males, and the elytra subtriangular. Cer. scriptus, Linn. Isle of France. 



The Longicornes of our third tribe, the Lamiarice, are distinguished by having a vertical head ; 

 the palpi filiform or scarcely thickened at the tips, and terminated by a more or less ovoid joint, 

 pointed at the tip. The outer lobe of the maxillae is slightly narrowed at the tip, and bent over 

 the inner division. The antennae are often setaceous and simple, and the thorax, exclusive of its 

 tiiljcrcles or spines, is nearly of equal breadth throughout. Some of the species are apterous, a pecu- 

 liarity which occurs in no other division of this family. 



This tribe is composed of the genera Lamia and Saperda of Fabricius, and some of his Sienocnri. 



Ceramhyx longimamis, Linn., neither belongs to this genus nor to Prionus, where it was at first placed, but to a 

 distinct one belonging to the Lamiariae, namely, 



Acrocinus, lUig. (Macropiis, Thunb.), distinguished from all other Longicornes by having the thorax furnished 

 on each side with a moveable tubercle, terminated by a point or by a spine. The body is flattened, the thorax trans- 

 verse, antennae long and slender, the fore-legs longer than the others, and the elytra truncated at the tips and 

 terminated by two spines, the outer one being the longest ; the most remarkable species is the A. longimamis, in 

 which the thighs and tibiae of the fore-legs are very long and slender; the upper side of the body is agreeably diver- 

 sified with grey, red, and black colours. 



All the other Lamiariae compose but a single genus, — 



Lamia,— 

 Which we divide into two sections,— those with the sides of the thorax tubercular or spinod, and those in whicli 

 it is entire and cylindric. The first is again divided into those with and those without wings. A great number of 



N N 2 



