OCR Text |
Show 530 INSECTA. Another species with a depressed bocty,.and in which the thit·d joint of the antennre and the three following ones are ter· minated by a little bundle of hairs, approaches the Callichromre with which we formedy art·anged it, in its general form and th; musky odour it diffuses. It is the .11.. alpina; Cerambyx alpinus L.; Oliv., lb., 67, IX, 58; cinet·eous-blue; six blackish spot; disposed longitudinally on each elytron, the two middle ones united and forming a band; a spot of the same colour on the anterior part of the thorax; superior part of the joints of the antennre also black. Common in the Alps; it is sometimes taken in the timber yards at Paris. The following Cerambycini have but eleven joints in the antennre. In some, at least in the males, the antennce are long and setaceous the last joint of the palpi is obconical, the thorax is either almos; square and slightly dilated in the middle, or oblong and nearly cy· lindt·ical-it is frequently rugose and tuberculated on the sides. They compose the subgenus CERAMBYX proper.-CERAMBYX, Lin. Fab. Certain species, with an unequal or rough thorax, usually spinous or tuberculated and dilated on the middle of its sides, with the third, fourth, and fifth joints of the antennce, evidently thicket than the following ones, thickened and rounded at the end; and the latter abruptly longer and thinner, almost cylindrical, forming, with the preceding ones, an abrupt transition, have been generically distin· guished by the name of Hamaticerus. The an ten nee are much longer in the males than in the females. C. heros, Fab.; Oliv., lb., I, 1. Length one inch and a half; black; extremity of the elytra brown and prolonged into a small tooth at the suture; thorax extremely rugose and with a pointed or spiniform tubercle on each side; antennce simple. Common in all the warm and temperate parts of Europe. The larva bores deep holes in the Oak, and is perhaps the Cossus of the ancients. A species called the militaris by Bonnelli, very similar to the heros, but without the sutural tooth, and with antennre propor· tionally shorter and more knotted, particularly in the female, is found in the departments of the south ofFrance. Speciea lnsectorum nondum de~criptas proposituri fasciculus, with four plates. He then figures various Cucurlionites forming new genera according to the system of M. Schrenherr. The descriptions are modelled on those of M. Gyllenhall, and are very complete. COLEOPTERA. 531 The characters drawn ft·om the antennce are much less strongly marked in another species from the same countr -th L . h. y e cerdo, .-wh1c IS much smaller, narro~er, entirely black, and without a tooth at the extremity of the elytra( 1 ). We refer to the same subgenus various species of Callichroma Dej.! with a smooth or ~ut slightly unequal thorax, which is pro~ port10nally Ionge!', and either of an oval shape and truncated at both ends or almost cylindrical. They are foreign to Europe; nearly all of'them ~elong to South America and arc of a small size. They are usually htghly de.corated, and some of them have one o1• two globular bundles of hatrs o~ the ant~nnce. Some even present this singular appearance on their postenor feet. Fabt·icius and Olivier arranged some of these species among the Saperdce. The thighs of these Insects are generally clavate and borne on a long pedicle, and their antennce composed of long and slender joints(2). We will also unite to the same subgenus of Cerambyx the Gnomre of Count Dejean. Their thorax is much longer and cylindrical. The inner angle of the superior extremity of the joints of the antennre 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. rugicollis, Fab.-as peculiar to Carolina, and the other-sanguinea, Dej.-to Brazil. Those Cerambycini in which the antennce are hardly longer than the body, and rather filiform than setaceous; where the thorax, always unarmed, is sometimes almost globular or orbicular, and sometimes nart·owet·, almost cylindrical and simply dilated and rounded ift the middle; and where the pal pi, always very short, terminate in a joint somewhat thicket· and wider than the preceding ones, and in the form of a reversed triangle, constitute in the early works of Fabricius, and in the Entomology of Olivier, the genus (I) For the other species, see Dej., Catalogue, &c., P· 105. In some, foreign to Europe, the thorax is elongatcu and unarmed as in the Gnom;e. The Oeramb: yx battus, and some others with spinous or serrated antenn.e, should form a particular division to be placed after the preceding one. (2) The Callichrom;e of Count Dejean-Cablogue-with the exception of the alpina, and probably the globosa also. Refer to it also the Callichrom;e described by M. Gcrmar in his Insect. Spec. Nov.; the Oallichroma scopiferum, the Oeramb~ x of the Entom. Ind., of M. KlUg, and the Saperda scobulicornis of ~~- Kirby, Lm. Trans. The Oerambyx perforatus, and the col/aria of !Wig, and the Gnoma clavipe.' of Fabt·icius, are remarkable for the length of the thorax, and approach the Gnom;e of Dejean. |