OF INSECTS IN GENERAL. 
341 
ter their transformation, are feen inhabiting the trees and 
pfants ; many of the fubterraneous infe&s in like man- 
ner rife into the air, fo foon as they arrive at their winged 
date. Several other attempts have been made towards 
the arrangement of infe&s, none of which feem to have 
been fo fuccefsful as that of the Swedijh naturalift above 
defcribed : By his fyftem, therefore, we (hall be chiefly 
guided in the following (ketch of the hiltory of thefe ani- 
jjials. 
Sect. V . — Of the Generation and Metamorfhojis of 
Infefts. 
We have already noticed the erroneous opinion which 
the ancients entertained concerning the generation of in- 
fe&s, and mentioned the efforts made by Rhedi and 
others, in order to combat it : After all their refearches, 
however, this part of our fubje& is far from being free 
of difficulty. Infe&s are remarkable for a greater variety 
of fexes than any other clafs of animals. In general, 
each individual is cither male or female ; but there is one 
order (that of the hymenoptera, which comprehends all 
the numerous tribes of bees, wafps, hornets, and ants), 
among which there is found a numerous race of animals 
that are neuters. Thefe take no part in propagating the 
different fpecies to which they belong, but feem devoted 
to the fervice of the more perfe& animals. This fa& is 
