STLK-W OR MS* 
221 
I have observed, in another place, that the 
male cocoons are very difficultly to be distinguish- 
ed from the female ; though there are, however, 
some marks which enable one to discriminate a 
good number. (Chap. IX. § 2.) 
Nevertheless, it is always very advantageous to 
separate those cocoons which appear to be male 
from the others. By this means fewer unite on 
the tables, and consequently, — 
1st. They are observed in succession, and those 
which are united can be removed. 
2nd. Those not united can be allowed to remain 
longer on the table, which is productive of advan- 
tage, as we shall see afterwards. 
3rd. It is more easy afterwards to bring them 
together, as it is more easy to take up those 
which are single than those which are united. 
The following is the best method to facilitate the 
hatching and subsequent union of the moths : — 
As I have said before, the moths begin to burst 
the cocoon as soon as it is daylight ; but they do 
not come forth in such great numbers during the 
first or second hour, as during the third and 
fourth. 
When the moths are seen united, they must be 
placed on a kind of frames covered with linen 
(Fig. 26.), expressly made in such a manner as to 
allow" the linen to be changed when it is dirty. 
