3i8 



THE GUIDE TO NATURE. 



COMPLETE TRANSFORMATION OF THE SILKWORM FROM EGG TO MOTH. 



Caterpillars in different ages in search of food. At base of branch, silkworm spin- 

 ning cocoon; at top of branch, the newly finished cocoon surrounded with floss; in the 

 middle of branch, cocoon of commerce; to the right, the moth emerging from the cocoon 

 and passing up to the mulberry leaf to lay its eggs; under the mulberry leaf, cocoon 



pierced by the emergence of the moth; at base of branch, 

 chrysalis stage; moths on right and left of branch. 



cocoon cut in half showing 



and, as far as possible, in their natural 

 position. Tn the exhibit the larvae should 

 be represented as ten day old, twenty day 

 old and thirty day old; they should be 

 placed separately in vials containing al- 

 cohol, it being the best preservative For 

 silkworms. 



Cocoons should be well formed and, if 



possible, show the differently colored 

 ones. They should be classed as follows : 

 the cocoon of commerce ; the cocoon as 

 pierced by the emergence of the moth ; 

 cocn surrounded with floss or the net- 

 work. A well developed chrysalis and 

 a perfect moth should complete the life 

 evele of the exhibit. 



