gg (ECONOMY 
and deceive many people, who fancy the 
worms are produced from the particles of the 
eheefe itfelf, by a generation called aequivocal, 
which is extremely abfurd, Others exclude their 
eggs upon certain animals. The mill-beetle Fn, 
618. lays its eggs betwen the fcales of fifties. 
The fpecies of glad-fly Fn. 1024. on the back of 
cattle, The fpecies 1025 on the back of the rhen 
deer. The fpecies 1026 in the nofes of ftieep. 
The fpecies 1028 lodges during the winter in 
the inteftinal tube, or the throat of horfes, nor 
can it be driven out till the fummer comes on. 
Nay infers themfelves are often furrounded 
with the eggs of other infers, i'nfomuch that 
there is fcarcely an animal to be found, which 
does not feed its proper infedt, not to fay any 
more of all the other places, where they de- 
pofit their eggs. Almofi: all the eggs of in^ 
feffSy when laid, are ordained to undergo, by 
a wonderfull law of nature, various metamor- 
phofes, e. g. the egg of the butterfly being 
}aid in the cabbage firfb of all becomes a cater- 
pillar, that feeds upon the plant, crawls, and 
has fifteen feet. This afterwards changes int© 
a nympho that has no feet, is Irnooth, and eats 
nothing *, and laftly this burfts into a butterfly , 
that flies, has variety of colours, is rough, 
and 
