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.
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