18 MANUAL OF NATURE STUDY. 



Collect an ant, a bee, a wasp, a butterfly, a grass- 

 hopper, and notice tbat they are all alike in that 

 they are all cut into in two places, hence name in- 

 sect, cut into. 



1. Let the pupils point out the head, chest, and 

 abdomen in each case. 



2. Point out the apparatus that belong to the 

 head, viz.: mouth, eyes and feelers. 



If you have a hand lens pass it around and let 

 the children see that each insect is provided with 

 compound eyes so that it can see in every direct- 

 ion without turning the head. 



How different is the grasshopper's eye from the 

 eye of the little boy or cat. Besides the compound 

 eyes, one on each side with many little faces, the 

 insect also has three little, simple eyes. See if the 

 children, by aid of the lens, can find them. Why 

 do you suppose they have those three simple eyes? 



2. The chest has three pairs of legs below and 

 two pairs of wings above. Let the children find 

 these and count them and see that they -all belong 

 to the chest or thorax. To little children there 

 may appear exceptions to this rule as every insect 

 of the group diptera, of which the common house 

 fly is an example, has but one pair of wings. In 

 place of the second pair two knobbed threads, or 

 "balancers" appear. But this should not be dis- 



