( '206 ) 



a Confirmation of the principle, that all living creatures deduce their 

 origin from thole which were formed at the Beginning. 



And if we compute how many Animalcules one female may pro- 

 duce in the courfe of a liimmer, reckoning from thofe ws find in 

 their hodies, w ithout conlidering thole that efcape our notice, we 

 muft be filled with afi^onifhment. 



Although thefe Animalcules were propagated fo rapidly in my 

 houle, as I have before fet down^ I have found that in the open air 

 they increafe flill fatier. 



I have alio obferved another fort of thefe Animalcules^ a littld 

 different from the former, for the bodies of the former \\ ere not only 

 fomewhat broadci% but, when 1 examined their heads and the hind 

 part of their bodies by the microfcope, I found that thofe parts were 

 alio different: for the former, when full grown, had a dark colour, 

 appearing blackifli ; the latter were green, and fo were the flies pro- 

 duced from them. I alio fiiw thefe two fpecies of Animalcules mix 

 one among another, whence I concluded that they were the two 

 iexes. 



As foon as the young of thefe Animalcules come from the pa- 

 rent, they can creep about, and appear as vigorous, as if they had 

 been long in the open air. 



I havecaufed drawings to be made of thefe Animalcules, in ordei* 

 to ihew the exadt regularity and perfedion which are fhewn in the 

 formation of fo contemptible a creature. 



Plate XVI. fg 28, reprefents one of thefe Animalcules of a light 

 green colour, the fame fize it appeared to the naked eye. Fig. 2g 

 A B C D E F G II, is the fame fecn through the microfcope, being 

 of its full growth and approaching to its change ; the wings, folded 

 together, begin to appear, and may be fcen in the figure at W X. 

 At KLMN, are the fix legs with their joints, covered with many 

 very thin and fliort hairs, and each of the feet furnilhed with two 

 claws. At F, is one of its two beautiful eyes, the wonderful for- 

 mation of which, as it appeared through the microfcope, tlie limner 



