INTRODUCTION. 
Of Morus and Burrerr iss in general, 
y® HE Opinion of Equivocal Generation however formerly received, has by the 
Wee) prefent Age been defervedly rejected ;. fince every Obfervation proves, that all 
EA el Creatures are produced by Parents of their own Kind, and that in general thofe 
adv sel Parents are Male and Female; and the Produétion of every Moth and Butterfly 
in this Manner, is I believe at prefent not doubted by any Body. 
_ Tue Females, both of the Moth and Butterfly, lay their Eggs in a fhort Time after Co- 
pulation, pow cr contiguous to what will fapply proper Food for the young Brood when 
produced. After a certain Period the Infant Caterpillars included in the Eges burft their 
Shells, crawl forth, and feed upon the Proyifion ready prepared for them. And each of thefe 
Caterpillars, having fed its appointed Time, becomes a Chryfalis or Aurelia; from which 
State, after a while, it iffues forth a Fd in the LikenefS of its Parent. 
Some Species of Butterflies breed twice aYcar. Thofe that come forth in May lay their Eges 
foon after, which Eggs in about nine Days Time are hatched. The Caterpillars feed for about 
fix Weeks, then change to Chryfalis, lie in that State for about fourteen Days, and then the 
Fhies are bred. Thefe lay their Eggs as the firft Brood did, the Caterpillars change to Chry~ 
falis in September, and the Fes come forth in the following May. 
The Variety of the Moth Kinds is fo great, that perhaps there is fearce a Day in the Year 
when fome of them are not bred. The Time of their Continuance in the Chryfalis State will 
be beft known by attending to the Account of each Moth defcribed in the following Plates. 
Some Moths as well as Butterflies breed twice a Year. 
Ty frequently happens, that the Fly does not come out at the ufual Time, but continues in 
the Chryfalis State till that Time Twelvemonth ; fo that the Creature remains in that Cafe 
a Year and nine Months (and fometimes longer) in a State of Reft, without Nourifh-. 
ment of any kind. ; 
TxHus much in general :——-We defcend now to particular Obfervations, 
On the different Manner of laying their Eggs, 
LL Butterflies and Moths lay a great Number of Eggs, fome even as far as two or 
three Hundred. The Eges of fome Kinds are glutenous, or covered with a glewy 
Moifture ; but thofe of others are not fo: The glutenous are fixt (fometimes fingly) on Grafs, 
the Leaves of Trees, Shrubs, &c. and fometimes in Clufters after the fame Manner. Some 
Sorts of Eggs are laid naked or uncovered, and others are cloath’d with a fort of Down, &c. 
Some/ Hes lay them in a Spiral Line, or Screw-like Figure, round a fall Twigg, a Stalk of Grafs, 
b 3 So 
