COLEOPTERA. 69 
ing the former, or Rhinosimus, to those in which the club is composed 
of four or five joints *, 
FAMILY IV. 
TRACHELIDES. 
In our second general division and fourth family of Heteromerous 
Coleoptera, the head is triangular or cordiform, and borne on a sort 
of neck or pedicle, abruptly formed, beyond which, being as wide at 
this point as the thorax, or wider, it cannot enter the cavity of the 
latter. The body is most commonly soft, the elytra are flexible, with- 
out strize, sometimes very short, and a little inclined in others. The 
maxilla are never unguiculated. The joints of the tarsi are fre- 
quently entire, and the hooks of the last bifid. 
Most of the perfect Insects live on different plants, devour their 
leaves, or suck the nectar of their flowers. Many, when seized, curve 
their head and fold up their feet as if they were dead; the others are 
very active. 
We will divide this family into six tribes, forming as many genera. 
In the first, or that of the Lagriarim, the body is elongated and 
narrower before; the thorax either almost cylindrical or square, or 
ovoid and truncated; the antennze, inserted near an emargination of 
the eyes, are simple, filiform, or insensibly enlarged towards the end, 
most frequently and at least partially granose, the last joint being 
longer than the preceding ones in the males; the palpi are thicker at 
the extremity, and the last joint of those of the maxillz is larger, and 
in the form of a reversed triangle; the thighs border on an oval and 
are clavate; the tibiz are elongated and narrow, the two anterior, at 
least, arcuated; the penultimate joint of the tarsi is bilobate, and the 
hooks of the last are neither incised nor dentated. 
The species indigenous to France are found in woods, on various 
plants; their body is soft, their elytra are flexible, and like the Meloes, 
the Cantharides, when taken, counterfeit death. 
This tribe is formed of the genus 
Laaria, fab.—Curysometa, Lin.—Cantuaris, Geoff. 
Those species, in which the antennz gradually enlarge, and are either 
wholly or partly almost granose, with the last joint ovoid or oval; in 
which the head projects but little before, and is prolonged and insen- 
* See Lat., Gener. Crust. et Insect., II, p. 231; Oliv., Col., and Encye. 
Méthod. ; Dej., Catalogue, &c., p. 77, and Gyll., Insect. Suec., I, ii, p. 640, and 
PUP pada ae 
