COLEOPTKRA. 531 



The characters drawn from the antennae are much less 

 strons>Iy marked in another species from the same country — the 

 cerdo, L. — which is much smaller, narrower, entirely black, and 

 without a tooth at the extremity of the ely'tra(l). 



We refer to the same subgenus various species of Callichroma, 

 Dej., with a smooth or but slightly unequal thorax, which is pro- 

 portionally longer, and either of an oval shape and truncated at both 

 ends or almost cylindrical. They are foreign to Europe; nearly all 

 of them belong to South America and are of a small size. They are 

 usually highly decorated, and some of them have one or two globu- 

 lar bundles of hairs on the antennae. Some even present this singu- 

 lar appearance on their posterior feet. Fabricius and Olivier ar- 

 ranged some of these species among the SapeVdae. The thighs of 

 these Insects are generally clavate and borne on a long pedicle, and 

 their antennae composed of long and slender joints(2). 



We will also unite to the same subgenus of Cerambyx the Gnomse 

 of Count Dejean. Their thorax is much longer and cylindrical. 

 The inner angle of the superior extremity of the joints of the an- 

 tennae is somewhat dilated. The palpi are almost filiform, and the 

 inner side of the mandibles exhibits a tooth. Of the two species, he 

 mentions one — G, rugicoUis, Fab. — as peculiar to Carolina, and the 

 other — scmguinea, Dej. — to Brazil. 



Those Cerambycini in which the antennae are hardly longer than 

 the body, and rather filiform than setaceous; where the thorax, al- 

 ways unarmed, is sometimes almost globular or orbicular, and some- 

 times narrower, almost cylindrical and simply dilated and rounded 

 in the middle; and where the palpi, always very short, terminate in 

 a joint somewhat thicker and wider than the preceding ones, and in 

 the form of a reversed triangle, constitute in the early works of Fa- 

 bricius, and in the Entomology of Olivier, the genus 



(1) For the other species, see Dej., Catalogue, &c., p. 105. In some, foreign 

 to Europe, the thorax is elongated and unarmed as in tlie Gnomje. The Ceram- 

 byx battus, and some others with spinous or serrated antenna, should form a par- 

 ticular division to be placed after the preceding one- 



(2) The Callichromse of Count Dejean — Catalogue — with the exception of the 

 alpina, and probably the globosa also. Refer to it also the Callichromas described 

 by M. Germar in his Insect. Spec. Nov.; the CalUchroma scopiferum, the Ceram- 

 byx of the Entom. Ind., of M. KlUg, and the Saperda scobulicornis of M. Kirby, 

 Lin. Trans. The Cerambyx perforatus, and the collaris of Kllig, and the Gnoma 

 clavipes of Fabricius, are remarkable for the length of the thorax, and approach 

 the Gnomse of Dejean. 



