122 



CHAPTER VII. 

 BUTTERFLIES and MOTHS (LEPIDOPTERA). 



Cabbage Butterflies, Surface Caterpillars, 

 Weather Effects, &c. 



Fig. 94. — 1-4, Large "White Cabbage Butterfly : eggs, caterpillar, and 

 chrysalis. 



Before continuing this course of observations I wish 

 once again to draw attention to their object being not 

 so much to give an account of the different kinds of 

 insects which attack our crops, as of the chief different 

 methods of attack. Thus, by studying the points of 

 some one kind of attack, we see for ourselves that all 

 other attacks which have the same chief points may 

 be lessened by the same kind of treatment. For 

 instance, whether it is grub or caterpillar, or beetle^ 



