OF INSECTS IN GENERAL. 
33 6 
fyftemntic writers the mod proper characters for the ar- 
rangement of thofe animals. According to their form, 
they are either fetaceous, filiform, monilifonn, clavated, 
capitated, fiffile, paginated, or bearded ; and in their pio- 
portions, they are either longer than the body, or fliorter, 
or of equal length with that part. 
The feelers have already been noticed, as conftituting 
the organs both of touch and of fmell ; and have two, 
three, and lometimes four joints. Some infects are faid 
to have no mouth ; in general, however, that organ is 
fituated under the head, and to it the feelers are attach, 
ed : In fome fpecies, the mouth is placed under the 
breaft ; in others, the roftrum is of confiderable length, 
having an upper lip, tranfverfe jaws, teeth, and a tongue, 
not un frequently rolled up in a fpire. due llemmata, 
or fmall eyes, are three brilliant convex fpots, fituated 
upon the crown of the head. 
* The thorax is placed between the head and the abdo- 
men, and is that part to which the fulcra or limbs are 
attached: immediately behind it is placed the abdomen, 
containing the ftomach and vifcera. It is divided into 
five fegments, each pierced on the fides with fmall fora- 
mina for the purpofe of breathing. It was long imagin- 
ed, thal; a ll the animals that are deflitute of red blood 
lived without refpiration : It has, however, been found 
by experiment, that this is not the cafe; and that, among 
the infect tribes, breathing is carried on, though in a dif- 
ferent manner, from what takes place among the larger 
animals. Infects are all furnillied with minute organs, 
which, in the language of naturalifts, are termed fig- 
rtiatci ; thefe are a number of fmall tubercles, ranged 
along’each fide of the body, each having an aperture in 
the top, called the fpivaclc, by which the animal breathes. 
Thefe 
