11

when injured. I have already said that their forms are various in different tribes, and for that reason they have been thought the most convenient parts for distinguishing the genera and species of insects; it is therefore necessary to acquaint you with their differences, which I will do as concisely as I can.

Antennw setacew, tapering towards the end. Antenncefi4forrnes, of an equal thickness, like

a thread.

Ant ennce monilformes, resembling a row of

beads.

,Antennce claratw, club-shaped, ending in a knob.

Antenna; f ssiles, the . thick end divided into

several parts..

Antennw pectinatce, feathered along the edge,

like the teeth of a comb.

Antennce barbatce, bearded with fine hairs.

Antennw per foliatce, having joints of a flat,

circular shape, threaded, as it were, by the body of the aiitcnmc,

Besides the antennae, insects are furnished
with palpi, or feelers, which are also jointed,
and are fixed to the mouth: they are generally
four or six in number, and seem to serve the
insect instead of hands, to bring the food to the
mouth,