. Cuvier's animal kingdom : arranged according to its organization. Animals. 516 INSECTA. Hololepta, Tayk., has the body very much flattened; the prosternum is not advanced over the mouth, and the four posterior tibiae have only a single row of spines. These insects are found beneath the bark of trees. The larva figured by Paykull as that of one of these insects, belongs to the genus Syrphus or Musca. Hister is composed of species having the prosternum advanced over the mouth, with the maxillae terminated by a short lobe, and the palpi but little advanced ; some of which have only a single row
. Cuvier's animal kingdom : arranged according to its organization. Animals. 516 INSECTA. Hololepta, Tayk., has the body very much flattened; the prosternum is not advanced over the mouth, and the four posterior tibiae have only a single row of spines. These insects are found beneath the bark of trees. The larva figured by Paykull as that of one of these insects, belongs to the genus Syrphus or Musca. Hister is composed of species having the prosternum advanced over the mouth, with the maxillae terminated by a short lobe, and the palpi but little advanced ; some of which have only a single row of spines on the four hind tibiae. These also live under the bark of trees, and compose Leach's genera. Plafysoma and Deiidropfiilus ; the first of which has the body flattened, H. picipes, Fabr. Those species which have two rows of spines on the four hind tibiae compose Leach's restricted genus Hister. Ex., //. â unicolor, Linn., one-third of an inch long ; entirely black and shining, and extremely common. M. Paykull has employed the num ber of teeth in the tibiae, and of the striae and punctures of the thorax and elytra, as well as the form of the body, to distinguish the species. A terminal division of this tribe comprises those Histeroides of very small size, havmg jftF^'i' T 'V^^^^ ^ nearly globose thick body, with the prostemum but slightly compressed at the sides ; ! ^ liii' \":Xù. not advanced over the mouth, and straight in front. Ahfceus, Leach, has the presternum prolonged as far as the anterior angles of the thorax, entirely concealing the antennae when retracted. H. globosus, Payk. Onthophilus, Leach, has the prosternum narrowed, and the club of the antennae lodged in an orbicular cavity situated beneath the anterior angles of the thorax. U. sulcatiis, Pk. Ce;<?ocer!/*, Germar, appears to approach Hister in the form of the antennae, feet, &c., but the elytra entirely cover the abdomen, and the jaws are not exserted. [The monograph of the genus Hist
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