302 INSECTS. COLEOPTERA. 



Rostrum, at least in the males, as long or longer than the body. 



Gen. BALANINUS. 

 ** Rostrum received into a furrow or hollow of the pre-sternutn. 



Gen. ECCOPTUS, CRYPTORHYNCHUS, CEUTORHYNCHUS, MACRORHINUS, 

 OROBITIS, MONONYCHUS. 



b. Club of the antennae commencing abruptly at the seventh joint (oval or ovoid.) 

 * Body narrow and elongated. 



Gen. MECINUS, DRYOPHTHORUS. 

 ** Body subglobular. 



Gen. CIONUS. 

 B. Posterior feet for leaping. 



Gen. ANOPLEUS, RHYNCHENUS, RAMPHUS. 



2. Anterior legs terminated by a strong hook ; antenna? of eight or nine joints, of 

 which the last forms the club. 



A. Antennae straight. 



Gen. OXYRHYNCUS, (Schcenherr ; Calandra discors, Fab.) 



B. Antennae geniculate. 



Gen. CALANDRA, RHINA, COSSONUS, RHYNCOLUS, HYLUROUS. 



Gen. CURCULIO, Lat. 



Antennae short, inserted near the point of the rostrum, genicu- 

 late, of eleven joints, the last three composing a club ; penult 

 joint of the tarsi bilobed ; body ovate, narrowed before. 



C. regalis, Fab. Rostrum and thorax black, with blue and golden 

 scales ; elytra golden green, with three transverse bands of gol- 

 den red at the base ; under part of the body golden-green. In- 

 habits Peru. Shaw, vi. 66. 



C. imperialis, Fab. Black, but covered with golden scales ; two 

 black lines on the head and thorax ; elytra angular at their base, 

 pointed, with elevated black shining striae, intermixed with large 

 sunk points of a golden green colour. Nearly 1^ inch long. In- 

 habits Brazil and Peru. Shaw, vi. pi. 22. 



The exotic insects of this genus are highly prized for the splendour of their co- 

 louring, produced by imbricated scales, analogous in their disposition to those on 

 the wings of the Lepidopterous insects. 



FAMILY IT. XYLOPHAGI. 



All the joints of the tarsi generally entire, or when the penult 

 joint is bilobed the palpi are small and conical ; antennae with 

 often less than eleven joints, perfoliated at the base, and thick- 

 est or clubbed at the extremity. 



This family live in wood, which the larvae furrow and bore in every way, and 

 where they are abundant in pine forests often destroy great quantities of timber. 



TRIBE I. SCOLITARII. 



Less than eleven joints in the antennae ; body subovoid or cy- 

 lindrical ; linear or clypeiform ; thorax the breadth of the ab- 

 domen, at least at the posterior part ; palpi small ; antennae 

 with five free joints before the club ; palpi very small and 

 conical ; the penult joint of the tarsi bilobed in some. 



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