COLEOPTERA. 525 



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; Cerambyx coriarins, L.; Oliv., lb., I, 1. Length, 

 fifteen lines; blackish brown; the antennae 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 metamorphosis 

 it enters theearth(l). 

 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 Regne Anim. should form a distinct 

 genus Anacolus. Messrs Lepeletier and Serville have described 

 two species sanguineus, lugubris in the Encyclopedic Methodique. 

 Finally, others with various and metallic colours in several have 

 a shorter, wider, and almost oval body; the head is frequently pro- 

 longed posteriorly behind the eyes; the antennae are simple and com- 

 pressed; the mandibles short; the thorax is wide, dilated, arcuated, 

 and unidentated 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 proportionally more elongated(2). 



2. The Cerambycini have a very apparent labrum extend- 

 ing 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 antennae, 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 



(1) The P. brevicornis, imbricornis, depsarius, &c. 



(2) The P. nitidus, Uneatus, Thomas, bifasciatus, canaliculatus, &c, Fab. 



The P. Spencii, 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 Method., article Prione. 



