Their Continuance in the _Fly_ State depends greatly on the Weather, many _Flies_ being destroyed as soon as bred, by Storms of Hail, _&c._ but if the Season proves favourable, many will live for a Fortnight, three Weeks, or longer, and some even all the Winter through. The Distinction of MOTHS and BUTTERFLIES. MOTHS and BUTTERFLIES agree in their Progression from the _Egg_ to the _Fly_ State, are different when in that State, in the following Particulars. BUTTERFLIES have a Ball or Knob at the Extremity of each of their _Antennæ_, or _Horns_. The Horns of MOTHS have not such Balls or Knobs, but are constantly threaded or pointed: except the Males of some Species, whose Horns are ramified, or in the Form of Combs. All BUTTERFLIES settle with their Wings erect, and generally keep them in that Posture, unless when basking in the Sun. Most MOTHS do not settle with their Wings erect, but place them horizontally, or inclining to their Feet. All BUTTERFLIES come abroad by Day-Light, and chiefly when the Sun shines bright. MOTHS fly, some by Day-Light, some by Twilight, and some in the Dead of Night. _N. B._ There is a Species of _Fly_ betwixt the _Moth_ and the _Butterfly_, whose Horns are more flat and hollow; this is describ’d in the second Book of this Work, by the Name of the _Burnet_. Concerning the Food of the FLY. The Food of these Creatures in the _Fly_ State, is very different from what it was when they were _Caterpillars_: _Butterflies_ feed on all Kinds of Flowers, and on several sorts of Fruits, and I have seen them extremely fond of the Juices that issue from the Bodies of several Sorts of Trees. _MOTHS_ feed on the same Things, as also on the Honey-Dew that is found on the Leaves of Limes, Elms, _&c._ The _Moths_, as well as the _Butterflies_, are furnished with a long Proboscis, or Tongue, which lies curl’d up like a Watch-Spring, under the fore Part of the Head. The Length of this Proboscis varies according to the Species of the _Fly_, and is from half an Inch, to four Inches long. The Enemies of _Moths_ and _Butterflies_. Nature has been so abundant in the Production of these Creatures, that were it not for the many Dangers they are exposed to, through every Stage of their Lives, the whole World would be too small to contain their Offspring, in four or five Years; for, upon Calculation, the Progeny of one Pair of large _Butterflies_, (supposing them to lay only 100 Eggs, whereas many of them lay 2 or 300, and that twice a Year) would be sufficient to cover the whole Kingdom of _England_ in about twelve Years. While in the Egg, they are devoured in great Numbers by Birds and other Animals. Whilst _Caterpillars_, they are a Prey to small Birds of all Kinds, being almost the only Food wherewith such Birds nourish and rear their young ones.