( ) 
cr their Return, and after that they were not feenany 
more. 
Becaufc the Flies did not live above two days in the 
laft clos'd Tube, I went again on the 25th of May into 
two dixlinft Gardens, becaufe I could find but one Fly 
in the firft Garden, where there had been fo many be- 
fore ^ and in t'other, where there had been many 
thoufands both of Flies and Lice, I could get but nine, 
and that too with looking out nicely. 
Thefe laft Flies that I caught were all Females, and 
had their Eggs in them 5 from whence I more ftrongly 
concluded that the Black Flies did the Trees no harm 5 
for if they had laid their Eggs on the Trees, and that 
all their Eggs had producd fo many living Infefts, 
there would not, 1 ampofitive, one Leaf, or any Fruit 
have remained on the Trees. 
After that thefe laft Flies had remained two days, 
and as many nights (hut up in the Glafs Tube, ther^ 
were but three left alive. . 
Now tQ fee whither the Water is the natural Ele- 
ment of thefe Creatures, as fome fay that they are pro- 
duced by the Sea, others f rom Ditches, I took a great 
Beer-glafs, and fiU'd it about half an Inch high with 
Water, and put 3 of my Flies upon fome Plumb-tree 
Leaves, and fo threw them in ^ but I obferv'd that they 
had an Averfion to the Water, for as foon as they 
came near it with their Feet, they prefently ran back- 
ward, and the next day they were all of them dead. 
Upon the occafion of taking thefe Flies, and the 
great number of Lice that fate upon the Leaves , of 
which I have given a Draught, in my printed Letter 
of the loth of July^ 1695, where I alfofaid that thefe 
Creatures bring forth their young without Copulation ^ 
I fhall fend you a Draught of them, as if I had never 
fpoken of them before, Becaufe I intend to bring thefe 
Creatures into the Clafs of thofe that are found living 
in the Seed of Males. Ooen* 
