_Microscope_,
I found within a day or two after I inclos'd her, almost all the inner
surface of the Box cover'd over with an infinite of exactly round Eggs,
which were stuck very fast to the sides of it, and in so exactly regular
and close an order, that made me call to mind my _Hypothesis_, which I had
formerly thought on for the making out of all the regular Figures of Salt,
which I have elsewhere hinted; for here I found all of them rang'd into a
most exact _triagonal_ order, much after the manner as the _Hemispheres_
are place on the eye of a Fly; all which Eggs I found after a little time
to be hatch'd, and out of them to come a multitude of small Worms, very
much resembling young Silk-worms, leaving all their thin hollow shells
behind them, sticking on the Box in their _triagonal_ posture; these I
found with the _Microscope_ to have much such a substance as the Silk-worms
Eggs, but could not perceive them pitted. And indeed, there is as great a
variety in the shape of the Eggs of Oviparous Insects as among those of
Birds.

Of these Eggs, a large and lusty Fly will at one time lay neer four or five
hundred, so that the increase of these kind of Insects must needs be very
prodigious, were they not prey'd on by multitudes of Birds, and destroy'd
by Frosts and Rains; and hence 'tis those hotter Climates between the
_Tropicks_ are infested with such multitudes of Locusts, and such other
Vermine.

* * * * *

Observ. XLII. _Of a blue _Fly_._

This kind of Fly, whereof a _Microscopical_ Picture is delineated in the
first _Figure_ of the 26. _Scheme_, is a very beautifull creature, and has
many things about it very notable; divers of which I have already partly
describ'd, namely, the feet, wings, eyes, and head, in the preceding
Observations.

And though the head before describ'd be that of a grey _Drone-Fly_, yet for
the main it is very agreeable to this. The things wherein they differ most,
will be easily enough found by the following particulars:

First, the clusters of eyes of this Fly, are very much smaller then those
of the _Dron-Fly_, in proportion to the head.

And next, all the eyes of each cluster seem'd much of the same bigness one
with another, not differing as the other, but rang'd in the same
_triagonal_ order.

Thirdly, between these two clusters, there was a scaly prominent _front_ B,
which was arm'd and adorn'd with large tapering sharp black brisles, which
growi