EXPLANATION OF THE PLATE. 



1. Tlie egg, or tlie development and biitli of tho silk wonn. 



2. Silk wonns during the first age — 5 days. 



3. Silk worms in tho second age — 4 days. ^ ' '} 



4. Silk worms in the third age — 6 days. 



5. Silk worms in the fourth age — 7 days. > 

 C. Silk worms in the fifth ago — 11 days. 



7. A species of silk worm of dark grey color. 



8. Tho Cocoons. 



'J. Two open cocoons, with their grubs— tho upper one containing only the shell of a de- 

 veloped chrysalis — the lower, the mature chrysalis. 



10. A cocoon from which the butterfly is near emerging. 



11. A cocoon from which tho butterfly lias escaped. 



12. Butterflies coupling. 



13. Female butterfly, laying eggs. 



The branch of the mulberry tree, repressnted in the plate, should not be overlooked. The 

 leaf is less indented, rounder, and larger than others less valuable. From trees with leaves like 

 this, scions for grafting should bo taken. 



