Sixth — Perforated or pierced cocoons can 
not be reeled in water, but sometimes they can be 
reeled around the finger without the use of water. 
They have an opening in one end, through which 
the moth has emerged. 
Seventh — Good choquettes. The worms in 
these have died ; if shaken, they do not rattle. The 
silk which they contain is as fine as that of good 
cocoons, but it is not so good for manufacturing 
purposes. 
Eighth — Bad choquettes. These are spotted 
and rotten cocoons, produced by unhealthy worms. 
They are of a dark color and are not worth reeling. 
Ninth — Calcined cocoons. They are of more 
value than any other quality of cocoon, but are 
very scarce. The worm inside, after having com- 
pleted its cocoon, becomes petrified, or converted 
into a white powder. 
Pointed and pierced cocoons, dupions, sufflons, 
bad choquettes, the waste in reeling, and the floss 
silk, are taken together, and form an article known 
as waste silk, which is spun into yarn. 
The chrysalis remains in the cocoon from 
fifteen to twenty days. 
For the purpose of breeding, an even number 
of male and female cocoons must be selected. The 
male cocoons may generally be distinguished by 
