( \Z6i ) 
Tree the Bark was pierced by the aforementioned litde 
Flyes, who from the hole at which they entred, had 
made each of them a ftrait perpendicular Channel 
from their entrance upwards, about two inches long, or 
fomething more, \^ery little, if at all, bigger than juft 
to move themfelves ftrait forwards in 5 for I obferved 
they all of them, if difturbed, came out backwards. AI! 
along on each fide this Channel, as clofe the one to the 
other as they well could, fo as yet to be diftind, there 
were fraall Channels running Horizontally from it, in 
every one of which at the extremity thereof there w^as a 
Maggot, in fize jaft the biguefs of the fmall Channel, 
very lively, whitifh, and almoft tranfparent. Thefe 
Trees, tho well Watered, received no benefit thereby, 
but dyed. 
It is to be obferved, that in thofe Trees whofe Leaves 
looked Green and Healthful, there was none of thefe 
Flyes to be found. 
The Reafon of which I prefame to be, that whilft 
there was a fufficient Moifture in the Earth about the 
Roots, to fupply the Tree with a due quantity ot Sap, fo 
thin and diluted that it was proper, and capable of being 
conveyed into the fmalleft Twigs and Leaf-veiTels, the 
Leaves kept their Verdure, and the Tree flourifhed : But 
when, by reafon of the dry feafon, that fapply failed, 
and the Sun perpetually exhaling the thinnert and more 
watry parts thereol through the Bark, the Sap already in 
the Tree became infufficient in quantity, as well as im- 
proper, by reafon ot its thicknefs^ to fupply or enter into 
all thofe fmall Veffels. The Lciuxs lolt their Greennefs, 
and fell off, and the Sap became thick and very fweet, 
( which I have found it is not when it is duly diluted, 
and the Tree in good health ^ ) this invited thofe Flyes 
to make their way to it, as a proper Nurfery to bring up 
their young ones ^ which 1 take thofe little Maggots to 
be. I prefume alfo, that the Eggs were firft laid in the 
H h h h h h h b h h h 2 great 
