forth, but growing white at laft ; having 24, Feet , 8 . on each 
fide of the body, and 4. befides, clofe to each fide of the head. 
During this form, they undergo conftantly 4. Sickneffes, in 
which they caft their Skins 3 each ficknefs lafting about 4. days* 
wherein they feed not at all ; but grow clearer, fhorter, and 
thicker. The fecond, from a Worm to an Aurelia or Chry falls , 
having the Ihape of a fmall Plum, whereunto it is transformed 
after its fpinning time is paft; in which ftate it lyes fhut up, in 
hot Countries, for 1 4. or 1 y, dayes $ in more temperate ones, 
1 8. or 20. without any Food or Air, known to us. During 
which time this InfeB leaves two Coats, both that of a Werm % 
whence ’tis changed into an Aurelia^ and that of an Aurelia, 
whence it becomes a Papilio or Butterfly , in the 'Theca or Cafe . 
The third is, from an Aurelia to a Butterfly, coming out of the 
Theca with a head, leggs,and horns; for which paflage it makes 
way by a whitifh water, it cats upon the Silk, which' raoiftning* 
and thereby in a manner putrefying it, the new creature thrufts 
out its head through the fharp end of the Cafe, by a Hole as big 
as its felf. There is found no Excrement in the Cafe , but the 
two Skins onely, juft now mentioned. 
Before they begin to fpin, and about the latter end of their 
feeding, they muft, faith the Author , be often changed, and have 
Air enough, by opening the Windows of the Room, they are 
in, if it be not too ill Weather $ elfe, faith he, the Silk that is 
-in their Belly, will caufe fo extrordinary a heat in them, that it 
burns their gutts, and fometimes burfts them; and the fame 
( being a fubftance that refembleth Gum or Burgundy Pitch ) 
will putrefy and turn into a yellowilh matter. 
He maketh the beft marks of their maturity for fpinning to 
be, when they begin to quit their white Col©ur,and their green 
and yellow Circles, and grow of the Colour of Flefli^ efpecb 
ally upon the tail ; having a kind of confiflent foftnefs, fhewing 
that they have fomething fubftantia! in their Stomachs, 
As for their Working he gives this account of it , that the firft 
day they make only a Webb ;the fecond,they form in this Webb 
their Cafs, and cover themfelves all over with Silk 5 the third 
day, they are no longer feen , and the dayes following they 
thicken their Cafes , alwayes by one end or thread, which they 
N 2 never 
