The 
While the little creature remains in this con- 
dition, there is a violent agitation in its blood, 
and a motion in all its internal parts. ‘The blood, 
ina hafty fermentation, is driven through the 
veflels from the heart into the wings, which are 
likewife fupplied with air from the lungs, ‘The 
infect, befides, labours violently with its legs: 
and all thefe motions concurring with the growth 
of the wings, it is impoflible the tender fkin 
that covers it, fhould not at length give way ; 
and this it accordingly does, by burfting into 
four diftinét and regular pieces. 
Firft, That part of the {kin which covers the 
trunk, the two ‘fore-pair of wings, the horns, 
and the furcille or forks *, falis off from thofe 
parts ; but the feveral portions of it, in which 
they were feparately wrapped up, remain firmly 
united together, Fig. x. a. This is the firft time 
the legs appear without any covering, and they 
then help greatly to ‘tee the body, and the other 
parts that remain yet bound up. At the fame 
time, the fkin on the back flies open, and dividing 
itfelf into two regular portions, 6 4, difengages 
the back and the wings. Then there likewife 
happens another rupture in that portion of the 
‘fkin, which covered the rings of the back of the 
Aurelia, c. Afier this the Butterfly remains very 
quiet for fome time, with its wings pointed down- 
wards, and its legs fixed in the fkin which it has 
jutt caft off. , 
_ But it muft be obferved, that the wings, legs, 
“horns, trunk, and other external parts of the 
Butterfly, do by no means rife from the body 
in the manner exhibited in the 11 Figure of 
the Table XXXV. where I have laid down all 
thofe parts, as they appear very diftin@ and 
confpicuous in the Caterpillar itfelf Many of 
thefe parts remain as has been already faid, firmly 
united to cach other, the reafon of which is, 
that they are all moift and wet in the Caterpillar, 
at the time when it is about throwing off its 
fkin, and becoming a Chryfalis; and this moi- 
{ture being of a clammy or glutinous nature, 
ferves, on its being dried by the air and heat of 
the weather, asa real glue, to unite the parts it 
lies between fo firmly together, that they never. 
feparate for the future. Now, as the fkin, 
which lines all thefe parts, or covers them on the 
infide, is extremely delicate and tender, which 
it well may be, as it is not expofed to the air, it 
all breaks and flies off without any certain order ; 
noris any order neceflary upon the occafion. Hence 
it arifes, that fo many broken and ragged little 
membranes, almoft as thin as a cobweb, appear 
on the inner furface of the fkin that has been 
thrown off. One of thefe little films is to be feen 
between the conglutinated coats or {kins of the 
trunk, horns, and other parts, Tab, XXXV. 
Figs x. d. 
There likewife appear within the {kin certain 
white filaments, ee, ‘Thefe are the caft coats of 
HUST or Y 
of a a el §, id 
the pulmonary tubes; for now thefe tubés caift 
their skins for the laft tine. The greateft part 
of the eighteen pulmonary tubes, of which I - 
have reprefented nine on one of the fides of the 
Caterpillar, in the fecond figure of the XXXIV. 
Table, remain in the Aurelia, which breathes by 
them, until by cafting this skin it becomes a 
periect Butterfly ; and this is the reafon, why 
the pulmonary tubes are much more flender in 
the Butterfly, than they were either in the Ca- 
terpillar, or the Chryfalis: this circumftance 
alfo affords the Butterfly the means of taking 
more air into its body, and thereby renders it the 
better able to fly, to give a due motion to the 
contents of its inteftines, to fuck in the juices on 
which it lives, to void its excrements, and to 
perform many other operations necefiary in the 
animal oeconomy. 
At the time when this change of skin hap- 
pens, the wings expand fo rapidly, that the 
naked eye cannot trace their unfolding, from 
reaching {carce half the length of the body, Tab. 
XXXV, Fig. w1.a, they acquire, O miracle of 
miracles, in the fhort {pace of about half a 
quarter of an hour, their full extent and bignefs, 
fo as to be each of them five times larger than’ 
they were before. Nor is it the wings alone that 
are thus increafed: all their fpots and colours 
heretofore fo minute, as to be fcarce cifcernible, 
b 6, ate proportionably extended; fo that what 
but a few minutes ago, appeared but as a num- 
ber of unmeaning confufed points, are now be- 
come diftinét and moft beautiful ornaments. All 
this may bg beft conceived, by confulting the 
x11 Figure, which reprefents the wings bigger 
than the body, and with all their colours, waich 
are chiefly red and black. About the edges, 
however, here and there fome yellow, sky-blue, 
and white fpots, are feen moft elegantly com- 
‘bined, which exhibit to us, though faintly, and 
as it were by fhadows, the inexhauftible treafare 
of the Great Creator’s treafures, his ftupenduous 
majefty, and his other incomprehenfible perfec- 
tions; for though no adequate reprefentation can 
be given of the Supreme Being, he has thus 
been pleafed to fhew himfelf to us, diftin@ly 
and confpicuoufly enough to engage our love, 
our adoration, and our gratitude, 
This little creature is found alfo to have four 
legs, Fig. x1. cece, each armed with claws, 
and adorned with hairs, and a variety of colours, 
The two horns dd, lie juft above the eyes: near 
the fpace between the eyes, are to be {een the 
forks or furce ; from between which the infe@ 
darts ¢ out a double trunk, the ufe of which is to 
pump out the {weet juices from flowers into its 
body, fo that this organ may be confidered as 
its tongue. When this curious part is not at 
work, it lies fo clofely curled and coiled up be- 
tween the forks, that it cannot be feen. This 
beautiful contrivance is reprefented in the xiith 
* Thefe appendages to the trunks of Butterflies have been fuppofed by fome to affift in the procuring, difpofing, or forcing down 
the food : but the nature of the Butterflies food isa plain contradiétion of that opinion ; 
Reaumer has therefore, with more juftice, alloted them the office of 
ufe. This is confirmed by the conftant obfervatien, 
more tender. 
for it is only a liquid, and thin honey juice. 
preferving the trunk from injuries, and {upporting it in its intended 
that thefe pieces or forks are always ftronger in proportion; as the trunk is 
Figure, 
