33^ OF INSECTS IN GENERAL. 



fyftematic writers the mod proper chara6lers for the ar» 

 rangement of thofe animals. According to their form, 

 thej are either I'etaceous, filiform, monillform, clavated, 

 capitated, fiffile, paginated, or bearded ; and in thei'- pro- 

 portions, tlicy are either longer than the body, or Ihorter, 

 or of equal length with that part. 



The, feelers have already been noticed, as conftituting 

 the organs both of tonch and of fmell ; and have two, 

 three, and fometimes four joints. Some infe^bs 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 

 bread ; in others, the roflrum is of confiderable length, 

 having an vippcr lip, tranfverfe jaws, teeth, and a tongue, 

 not unfrequently rolled up in a fpire. The Ilenimata, 

 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 tlie fulera 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 pnrpofe of breathing. It was long imagin- 

 ed, that all the animals that are deftitute of red blood 

 lived without refpiration : It has, however, been found 

 by experiment, that this is not the cafe; and that, among 

 the infc£l tribes, breathing is carried on, though in a dif- 

 ferent manner, from what takes place among the larger 

 animals. Infe£ls are all furnifiied with minute organs, 

 which, in the language of naturaliils, are termed Jlig- 

 viata \ thefe are a number of fmall tubercles, ranged 

 along each fide of the body, each having an aperture in 

 the top, called the fpiracle, by which the animal breathes. 



Thefe 



