8 A GUIDE FOR THE STUDY OF ANIMALS 



Observations. 



Notice the form and size of your specinlen, its color, 

 the number of its legs and of its feelers. Find the eyes ; 

 the two large eyes, a tiny one between the two feelers, 

 and near the inner edge of each large eye, another tiny 

 one. With a lens notice the markings on the large eyes. 

 Find the mouth, and note its lips and finger-like feelers. 

 Draw out an outer wing, and then carefully draw out the 

 delicate under wing, allowing them both to fold into place 

 again. Under the wings find the circular or crescent- 

 shaped membranes, the eardrums. Watch the grass- 

 hopper's body expand and contract in breathing, and find 

 the small breathing holes along each side the body. Com- 

 pare its rate of breathing with your own. 



Questions. 



1. In what surroundings and how does the grass- 

 hopper's color protect it.? What color markings has it 

 which might serve for other grasshoppers to see as 

 signals ? Explain how this signaling is done. 



2. Explain how the legs are placed so as to act as 

 springs in jumping and alighting. 



3. What advantages in having the wings attached on 

 the upper side and the legs on the under side of the body ? 



4. Explain how the small wings are protective, and how 

 the large ones are protected. 



5. Why is it better for the grasshopper to have its 

 mouth on the under side of its head instead of in front .' 



6. The large eyes are supposed to be far-sighted, the 

 small ones near-sighted. State how the large eyeS have 

 the more advantageous position, and around how much of 

 a circle they can see. 



7. Describe how the grasshopper breathes. 



