6 The of 
it there becomes alfo thick, and more extube- 
rant; for the limbs, which have increafed 
there under the common {kin, fwell by de- 
grees. This is particularly manifeft, 4. about 
the third and fourth annular incifion in the 
fore part near the head. Before this Caterpil- 
lar cafts its {kin, it becomes wholly deprived of 
motion; and in the place juft mentioned is 
fill more confiderably diftended ; and the body 
becomes fhorter, becaufe the blood and juices 
are conveyed toward the breaft from the hin- 
der parts. I here likewife fhew the manner 
wherein this little creature, whilft it twifted it- 
{elf continually up and down in perfecting its 
web, has by that continual agitation worn off 
the greateft part of its hairy: feathers; and as 
they have fallen into the cavity of the web, 
hence is produced a little feather-bed, as it 
were, in which the Caterpillar lies the fofter. 
To this may be added, that thefe hairs, lying 
loofely and fcattered in the web, render the 
change of the fkin much eafier, and they are 
afterwards moved backwards with the {kins 
from the fore parts. 
No. V. [exhibit in this figure the fame Ca- 
terpillar, when upon cafting its fkin, it has af- 
fumed the form of a male Chryfalis, and fhews 
all the limbs of the noGturnal Butterfly, that is 
to burft from thence. 
This reprefentation is more obfcure in the 
Chryfalis than in the Nymph; for the latter, 
as has been before fhewn at large, in its proper 
place, very clearly difplays to the eye the limbs 
of the little infect to be produced from it, on 
cafting its fkin. However, as the Chryfalis 
does really alfo exhibit to view all the limbs 
and parts of the future creature, and is, in 
reality, that very creature which it reprefents, I 
fhall likewife exhibit thefe parts in this Chryfa- 
lis. The fourth and fifth figure anfwer this 
purpofe. 
No. VI. In this figure I reprefent the fame 
Caterpillar, as it appears when firft changed 
into a Chryfalis, and afterwards, after cafting its 
laft fkin, becomes a male nocturnal Butterfly or 
Moth. When thefe infects have obtained this 
laft form, they afterwards neither grow nor are 
at allchanged, but are intent upon generation 
only; as I fhall more clearly fhew in the ex- 
planation of the following figures. In the 
mean time I thew the elegant antenne, aa. 
which this male has, its {mall body, 4. and its 
four wings, cc. which the female has not. 
Tas. XXXII. Fic. 1. 
The egg of the nocturnal Butterfly, whereof 
we are fpeaking, 1s the principal figure repre- 
fented magnified: Its purple ring, and fome 
little depreffions and inequalities, whereby it 
is remarkably diftinguifhed from all other eggs, 
are {hewn in this igure. This egg is alfo fome- 
what deprefied in the middle, which makes it 
appear as if perforated and open in that part, 
when viewed without a microfcope. 
: BEG ait 
This exhibits the fame egg broken into two 
parts, and forfaken by its inhabitant: for as.it 
is covered with a hard fkin, or fhell, like a 
BOOK 
‘ 
\ 
NP Ag Pe Ue RUE > Sok, 
hen’s ege ; hence it is not rolled up, or drawn 
afunder like a membranaceous integument, as is 
commonly the cafe in the eggs ef Ants and 
Bees: it is on the contrary torn from the Ca- 
terpillar, which it before invefted, in form of 
a jagged fhell. This manner of feparation is 
not univerfal among all thefe egos; for, ac- 
cording as the fkin or fhell is more or lefs hard, 
and the oppofition great or fmall; the de- 
-ferted thells are found to vary more or lefs 
from the form we have defcribed.. One may 
from thence fee, after what various ways the 
‘infects put off their firft coats and fkins, which 
may be eafily illuftrated by other examples. 
Pret Mri: 
In the third figure 1 thew the’ method 
wherein thefe eggs are glued to the web. I 
fhall prefently treat of this particular more at 
large.. It is in this deferted web feen alfo, 
what an hole the nocturnal Butterfly made, 
when about to creep out of the web. 
tine wiae 
In the fourth figure are reprefented all the 
parts of the male Butterfly in the Chryfalis it- 
ielf; namely, 
a. The two eyes in the head, under which, in 
the thorax, next between the upper legs, the 
trunk is fituated. 
66. The antenne or horns, with their inte- 
guments, removed from their natural fituation, 
which is clofe to the body. 
cc. Six legs likewife removed from their 
places. 
dd. "The upper and under wings in their na- 
tural fituation. 
e. The rings of the body, in which are re- 
prefented fome hairs deprived of their fkin : 
This is likewife the cafe, with refpect to thofe 
hairs which are feen on the head. 
IDS Mera op 
All the before-mentioned parts are in this 
figure exhibited in the Chryfalis of the female 
Butterfly of this fpecies; but thefe are not re- 
moved out of their natural fituation. It is evi- 
dent, by this figure, that the female Chryfalis 
differs in three tefpects from the male Chryfa- 
lis: firft, as to the horns or antenne ; then in 
‘re{pect to the wings ; thirdly, in regard to the 
fize and thicknels of the body; but thefe things 
will be made more evident, in the explanation 
of the fixth figure. I muft alfo call to mind 
here, that this compofition or texture of the 
limbs, though various in the fexes, yet never 
makes what is called, an effential difference 
between the Chryfallides of the various infects, 
but only an accidental one, confifting in the 
fhortnefs or length, or bignefs and fmallnefs of 
the parts. We muft further obferve, that this 
Chryfalis, and the infect, which, upon chang- 
ing its fkin, is to arife out of it, do not in the . 
leaft differ from each other, except only in the 
order and difpofition of the parts, which are 
arranged in the Chryfalis, fomewhat otherwife 
than they are in the perfect infect, or the 
Chryfalis, after cafting its fkin: This fhould 
indeed be obferved mott carefully. 
8 
