Читать книгу A Guide for the Study of Animals - Worrallo Whitney - Страница 51

1 With what legs does the bug swim? Describe their appearance and tell how used and how fitted for this use. Which legs are not used in swimming?

2 Remove the bug from the water for a moment to test other methods of locomotion, as jumping, crawling, flying. What do you discover?

3 Watch the bug as it gets a fresh supply of air, and describe the process. Where is the air stored for use when under water? Does the bug sink or rise when it stops swimming? Why?

4 Identify the bug's mouth parts. What is their appearance and probable manner of use? How are the forelegs fitted for grasping food?

5 What is the shape of the body? What is the position of the wings? Do the two cover (fore) wings meet in a straight line or do they cross at their tips? Are they smooth throughout and sheath-like, or are they thick at the base and thin at the tips?