PART II 



METHODS AND APPARATUS. STRUCTURE AND CLAS- 

 SIFICATION OF INSECTS 



CHAPTER I 



ACQUISITION AND PRESERVATION OF INSECT FORMS 



IF there is one thing above another which commends 

 the study of insect life in the secondary schools, it is the 



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comparative ease with which the biological material can 

 be procured. The study of Zoology is essentially a 

 study of things, not books. And these things must be 

 in the student's hands. Books furnish suggestions for 

 study; they call attention to points liable to be over- 

 looked by the untrained eye. In order that the practi- 

 cal as well as the highest educational value can lie 

 attained, the forms must unquestionably be placed in 

 the hands of the student. 



The teacher, situated far inland, who places stress 

 and long study upon marine forms, unless well supplied 

 with material, overlooks the most important element in 

 Natural History instruction. The student needs to 

 know not only the component parts of the form under 

 consideration, but the reasons for the existence of these 

 conditions. True, he may be told them. This makes 

 little impression. With how much more force will the 

 lesson come to him if he is enabled to see with his own 

 eyes that the colors of the grasshopper harmonize with 

 its natural surroundings; that the cloak of the pupa 



has a capacity to resemble in color its support ; that 



(222) 



