clofed wings and legs, that the reft of the 
body, drained of its juices, muft of courfe 
become proportionably fhorter. The fame al- 
terations take place in the trunk, the forks, 
the eyes, and horns; all which equally fwell 
and expand themfelves, and endeavour to make 
way for their laft increafe. vaplbie 
By the time the Caterpillar has hung in this 
manner fifteen or eighteen hours, it fo entirely 
lofes the power of all its fixteen legs, as not to 
be able to make the leaft ufe of them to crawl, 
or ftand. The rings of its body then begin to 
move up and down, in a very fenfible and fur- 
prifing manner. Then the eight legs, c, in 
the middle of the body, grow lefs and lefs by 
degrees, caft their fkins, and are turned towards 
the tail, Fig. 1v. z. The fix fore legs, Fig. 
d, move upwards in like manner, and feparate 
themfelves from each other, Fig. 1v. 6... Soon 
after the black horny bone of the fkull be- 
comes fplit into three diftin& parts, by the 
fwelling of the trunk, horns, and the other. 
parts lodged there, that lie under it. Of thefe 
three parts of the fkull, one is in the middle, ¢, 
and the other two, de, are on the right and the 
left. This being accomplifhed, the firft ob- 
fervable change is the breaking out of the 
forks, or furcille, from under the fkin that 
covered themipyija* VS oO 
As the Caterpillar ftill continues to move its 
body, the four pair of legs in the middle of it, 
Fig. v. aa, are by degrees thruft quite up to 
the tail, with the reft of the fkin; and the 
fame thing happens to the two pair of the fix 
legs of the firft feries, 6. By this means the 
forks, c, become ftill more vifible, and the 
trunk, horns, and wings, begin to fhew their 
form. Liaftly, the three pieces of the fkull, d, 
into which it burft, are found to be drawn up 
higher over the body. 
The fkins being at length entirely depofited, 
all the parts, now mentioned, appear very 
plainly expanded over the body, Fig. vr. a, 
which, by this means, acquires a form altoge- 
ther different from that which it before had. 
The wings, horns, trunk, and forks, which 
before were folded up and hid under the fkull, 
and the horny fubftance of the legs, are now 
difplayed ; and the rings of the abdomen are 
alfo gathered up clofer to one another. The 
Caterpillar is now dignified with the name Au- 
relia, remaining all this time fixed to the web, 
6, by its claws. But as this cannot be fo well 
made to appear by a figure no bigger than the 
infect itfelf, I fhall give a drawing of thefe 
parts as magnified by the microfcope. 
In the firft place appear the furcille, or 
forks, Tab. XXXV. Fig. vit. aa; then the 
middle’ part of the head, placed under the 
full, 6: the root of the trunk, ¢c. The pro- 
bofcis, or trunk itfelf, divided into two fila- 
ments, dd, and ftretched lengthways upon the 
body, ¢. Under the trunk lie the firft pair of 
legs, ff; whofe articulations are placed a little 
lower. Next to thefe are placed the fecond 
pair.of legs, gg, which are ftretched out to a 
greater length, and thefe fhew their articula- 
The. & SiTPTOARVY 
oN 6 BE Gn §, 
tions at the extremities. Near thefe are placed 
the little horns, 64, whofe articulations alfo are 
very confpicuous. It appears that they are very 
thick near their points, 77, and.on the fore- 
part they bend themielves back under the eyes, 
kk; but this circumftance appears better in the 
third figure, under the letters az. The wings 
are ftretched along the fides, in the fame man- 
ner with the parts already mentioned, ////, and 
fhew very plainly the little ribs or nerves that 
go to form them, mm. ‘The rings of the ab- 
domen appear drawn toward one another, 22, 
with fome little prickles {tripped off their fkin, 
which look like fo many little prominent nip- 
ples, or papille. This beft appears by infpect- 
ing the left fide of the figure, where fome of 
thefe prickles are reprefented growing upon the 
infeét’s back, 00. Above thefe prickles there 
appear four breathing-holes, or puncta re{pi- 
ratoria. Laftly, the tail, p, is very confpicu- 
ous, as well as the claws, g, that grow to it; 
and by means of thefe the Chryfalis hangs to 
its web. The hind legs are not to be found 
in this figure, becaufe they lie hid under the 
other parts which it was drawn to. exhibit. 
The fame muft be underftood of the under 
pair of wings. 
On turning the infeG, thus. changed and 
tripped of its fkin, Fig. viti. 2, on its belly, 
it appears of a very extraordinary figure, the 
furface of it looking exaGily as if covered with 
prickles and nipples; which is owing to this, 
that the fharp-pointed hairs of the Caterpillar 
have caft a fkin, as well as the other parts. A 
perfon, unacquainted with this branch of na- 
tural hiftory, might, by giving in this place ,a 
little loofe to his imagination, reprefent to him- 
felf the nofe, eyes, and other parts of the . 
human face, as fome authors have already very 
ignorantly done; nay, they have given draw- 
ings of their idle conceits. 
Ignorance is fruitful in falfe opinions, and is 
ufually accompanied with fo much felf-fuffi- 
ciency, as makes it in a manner impoffible to 
overcome its prejudices; whereas thofe who 
have a tolerable fhare of knowledge, are in the 
readieft way to difcover their miftakes. 
The Caterpillar, ftripped of its fkin, in the 
manner now related, is of a green colour, 
efpecially in thofe parts which are diftended by 
an extraordinary afflux of the blood. But after 
ten or twelve hours pafled without its fkin, it 
turns to the moft refplendent and beautiful 
gold colour. This is the reafon of its being 
called, in this condition, an Aurelia or Chry- 
falis. And as it is found fo common by every 
pathway, flicking to nettles, and thining like 
polithed gold, faftened to the leaves of the 
Pervinca, or periwinkle-plant, authors have, 
from this circumftance, taken occafion to give 
the name of Aurelia to all Caterpillars, changed 
after the fame manner in point of fhape, tho’ 
the greateft part of them do not in the leaft 
partake of this rich colour, ard the reft have 
nothing of it more than a few fpots. 
It now remains that I fhould thew, in a few 
words, in what manner all the laft enumerated 
parts 
ij 
