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Show 460 INSECTA . the three last joints; head triangular; thorax nearly square, and a). most isometrical( 1 ). BoRos, Herbst.-Hypophl:.eus, Fab. The tibice simple, and the club of the antennce compressed and formed by the three last joints; but the body is almost linear, the head oval and narrowed posteriorly, the thorax oval and truncated at each extremity, and the last joint of the maxillary palpi forming a truncated ovoid and but slightly inflated(2). 3. Those in which the body is equally narrow and elongated, and the thorax almost square, but where the antennce are of the ordinary thickness, and are not abruptly terminated by a club. The two anterior thighs are stout, and the tibice narrow and curved, or arcuated. Here the penultimate joint is perfectly similar, both in form and size, to the preceding; and the latter, like all the others, is neither dilated nor canaliculated above. In CALCAR, Dej.-Trogosita, Fab. The thorax forms a long square, the body is linear, of equal width throughout, the anterior border of the head is emarginated, and the three last penultimate joints of the antennce are almost globular, and not sensibly transversal(3). UPxs, Fab. The thorax as in Calcar; the body narrow, but not linear; anterior edge of the head straight and unemarginate; penultimate joints of the antennce lenticular and transversal( 4). The TENEBRio, Lin. Fab. Or Tenebrio properly so styled, only differs from Upis in the thorax, which is more broad than long. T. molit01·, L.; Oliv., Col., III, 57, 1, 12. Length seven lines; brown, verging on a black, above; maronne and glossy beneath; thorax as wide as the elytra; square, and with two posterior (1) Toxicum richesianum, Lat., Gener. Crust. et Insect., IT, p. 168, and I, ix,9. I have seen another species in the cabinet of M. Labillardiere, which from its appearance seems to be closely allied to Opatrum. (2) Boros corticalis, Gyll., Insect. Suec. I, ii, p. 584; Hypophlmus borot, Fab.;- B. tlwra:cicus, Gyll., lb., p. 586. (3) Trogosita calcar, Fab. (4) Upi8 ceramboides, Fab.;-U: saperdoides, Bose. COLEOPTERA. 461 impressions; elytra striate and punctured.-Very common, in the evening, in the less inhabited parts of houses, flour mills, bake-houses, on old walls, &c. Its larva is long, cylindrical, of an ochreous yellow colour, scaly, and very smooth. It lives in bran and flour, and is given to the Nightingales. It becomes a chrysalis in the midst of the substance on which it has fed. T. g1·andis, which is found in Brazil, under the bark of old trees, darts a caustic liquid from its anus to the distance of more than a foot. Other but smaller species from the same country completely cover themselves with this material. J:t'or these observations I am indebted toM. de la Cordaire(l). There, the penultimate joint of the tarsi is very small, in the form of a little knot, and received into a longitudinal groove in the preceding, whic4 is more dilated than the preceding ones, and almost cordiform. The anterior edge of the head presents an emargination occupied by a portion of the labrum. HETEROTARsus, Lat. A subgenus founded on an Inseet from Senegal, having· all the characters of a Tenebrio, but with singular tarsi. At the first glance, the two anterior ones appear to consist of but four joints, and the two others, of three. FAMILY II. T AXICORNES. In this second family of the heteromerous Coleoptera, we find no small corneous tooth on the inner side of the maxillre. All these Insects are winged, their body is most commonly square, their thorax trapezoidal or semicircular, and concealing or receiving the head. The antennre, u8ually inserted under a marginal projection of the sides of the head, are short, more or less perfoliate or granose, enlarge insensibly, or terminate in a club. The legs are only adapted for walking, (1) For the other species, see Catalogue, &c., Dej., and Fabricius. This genus, however, as now composed needs depuration; several of its species belong to Phaleria, or other subgenera. Some of them may even form new ones. |