106 INSECTA, 
antenne are pectinated or strongly serrated in the males, and com- 
posed of more than eleven joints in several of these individuals; and 
where the elytra are as long as the abdomen, and cover it superiorly, 
as well as the wings, would form a second general division. 
P. coriarius ; Cerambyz coriarius, L. ; Oliv., Ib. 1,1. Length, 
fifteen lines; blackish-brown; the antennz serrated and com- 
posed of twelve joints in the male; three teeth on each lateral 
margin of the thorax. The larva lives in the decayed trunks of 
Oak and Birch trees. When about to undergo its metamor- 
phosis it enters the earth *. 
It appears to me that other Prionii, peculiar to Brazil, of an analo- 
gous form, but with small triangular elytra which do not entirely 
cover the abdomen-——Fam. Nat. du Régne Anim.—should form a 
distinct genus—Anacotus. Messrs. Lepeletier and Serville have de- 
scribed two species—sanguineus, /ugubris—in the Encyclopédie Mé- 
thodique. 
Finally, others with various and metallic colours in several have a 
shorter, wider, and almost oval body; the head is frequently prolonged 
posteriorly behind the eyes; the antennee are simple and compressed ; 
the mandibles short; the thorax is wide, dilated, areuated, and un- 
identated laterally, and obliquely truncated or emarginated at the 
posterior angles ; the abdomen is nearly square, about one-half longer 
than it is wide. The scutellum is usually large. The ligula is pro- 
portionally more elongated f. 
2. The Cerampycini havea very apparent labrum extending across 
the whole width of the anterior extremity of the head; their two 
maxillary lobes are very distinct and salient; their mandibles of an 
ordinary size, and similar or but little different in both sexes; their 
eyes always emarginated and surrounding, at least partially, the base 
of the antenne, which are usually as long as the body, or longer; the 
thighs, or the four anterior ones at least, are commonly in the form 
of an ovoid or oval club, narrowed into a pedicle at base. 
In the first place we have those in which the last joint of the palpi 
is always manifestly thicker than the preceding ones, and in the form 
of a reversed triangle, or obconical; where the head is not sensibly 
narrowed and prolonged anteriorly in the manner of a snout; where 
the thorax is not widened from before posteriorly, and does not pre- 
sent the figure of a trapezium or truncated cone; and where the ely- 
tra are neither very short and squamiform, nor abrupily narrowed a 
little beyond their base, and subulate at the extremity. The species 
* The P. brevicornis, imbricornis, depsarius, &e. 
+ The P. nitidus, lineatus, Thome, bifasciaius, canaliculatus, &¢., Fab. 
The P. Spencit, Kirby, Lin, Trans. XII, xxii, 13, appears to belong to the same 
division, or to form a separate one. See Lat., Gener. Crust, et Insect. I, ii, p. 30, 
et seq. ; and Encyc, Méthod,, article Prione. 
