Thes Ee tS! THO’ R Yo om ION SEC Tus 
The anatomy of aChryfalis, fix or 
HE external limbs, and other parts, as 
the trunk, horns, legs, and wings, are 
by this time grown fomewhat more dry and 
firm, though {till they are of a white colour, 
which is changing by degrees to gray. ‘The 
alteration in the internal parts is now much 
more confiderable. The ftomach, which be- 
fore might be confidered as forming feveral 
diftinct parts, is now fo wrinkled up as to be 
all of a piece, except that here and there ap- 
pear fome globular fwellings above the furface. 
Thefe prominences are very obfervable on the 
forepart 5, but not fo diftinctly to be feen, by a 
The anatomy of a Chryfalis 
Was trunk, at this time, has acquired a 
confiderable folidity. The horns thew 
their little fealy feathers; and the legs, in like 
manner, very plainly exhibit their ftiff hairs, 
refembling briftles: but the fcaly little feathers 
are far from being fo confpicuous. The legs 
are alfo now of an obfcure gray colour, efpe- 
cially about the joints neareft the thorax. The 
hairs and little feathers of the wings are like- 
wife very difcernible ; but, as yet, they are very 
moift, and are laid fo clofe one upon the other, 
that it requires fome induftry to get a fight of 
them. They refemble, in fome meafure, the 
hairs of a Cat; in which, after the fkin has 
lain in the water for fome days, they are 
fattened together by the moifture they imbibe. 
‘The wings now will admit of being extended, 
and fhew, if they be torn, their pulmonary 
tubes, and other veffels. ‘Their colour is an 
7 
eight days after it has café its hin, 
great deal, where the clofed inteftines took 
their rife in the Caterpillar; about the hinder 
region of the ftomach. The moifture con- 
tained in this part is changed to a deeper purple. 
The mufcles of the thorax are become more 
confpicuous, diftiné, firm and folid; and the 
fat is {till more and more contracted into a 
fimple mafs. I could now plainly perceive, 
that the purple nodule, or knot, was nothing 
more than a dilatation of the rectum, or ftraight 
gut, changed to this form. ‘The rudiments of 
the genitals are by this time very vifible, and 
have begun to acquire firmnefs and ftrength. 
of twelve or thirteen days. 
afhy gray, but obfcured bya dusky tinge. All 
the parts Ihave mentioned are quite complete, 
and perfect, in a Chryfalis of fixteen or feven- 
teen days old. By repeating this diffeCtion 
every day, we may, no doubt, obferve the moft 
extraordinary tranfitions, that can be imagined, 
from one colour to another ; for, from a pale 
and whitifh or faint gray, thefe parts change 
to adark colour, a deep brown, an elegant red, 
a yellow, a sky-blue, a bright white, and many 
other tin@s; and this in fo furprifing a man- 
ner, that it is almoft impoffible to defcribe it: 
Gop, the author of all miracles, producing 
thefe alterations, in the nature of things, by 
rules which, at the fame time that they are 
moft firmly eftablithed, infinitely furpafs the 
{trongeft efforts our imagination can make to 
comprehend them. 
The anatomy of a Chryfalis, of this fpecies, of fixteen or feventeen days old; at 
which time it is very near undergoing its laft change, in order to become a perfect 
Butterfly. 
QO examining the Chryfalis at this period, 
we find, that its gold colour is become 
much paler; and it is fo tranfparent withal, as 
to let us perceive diftinctly through it all the 
colours of the upper pair of the future But- 
terfly’s wings. If we ftrip off the skin, and 
other thin membranes that theath the wings, 
thefe laft fometimes appear perfectly dry. But 
this principally happens in autumn, when thefe 
Chryfallides are generally fuffocated within 
their skins; the folar heat, at this feafon, being 
too weak to ftrengthen them {fufficiently for 
the {truggles which the burfting of their prifon 
requires, otherwife the wings always retain 
fome moifture. The forky particles, which I 
have before defcribed in the Chryfalis, now 
thew themfelves hollow; and the eyes, which, 
like thofe of Bees, are furrounded with hair, 
‘appear under them very plainly. The trunk 
has acquired its due ftrength, firmnefs, and 
form, fo that it prefently curls and coils itfelf 
up, on taking off the cafe that covers it. Un- 
der the trunk are to be feen ‘the true forks, 
between which the Butterfly hides that curious 
organ, as will appear in the defign I fhall give 
of that infect. The horns alfo are now per- 
fect, and are covered with their little elegant 
{cales, which refemble feathers. The legs, with 
their little feathers, joints, and claws, are in 
the fame ftate of perfection; fo that, on 
{tripping off the coats and membranes in 
which they are bound up, they will begin to 
play, and move themfelves very fenfibly. 
Thofe legs, which, in the Chryfalis, lie mot 
expofed to the air, and which I have already 
reprefented in one of thefe defigns, as they 
appear upon the infect at that period, have in 
proportion a ftronger skin to defend them. The 
fame wife difpofition is alfo remarkable in the 
skin that defends the upper and. lower pair of 
18, wings, 
