60 STUDIES OP ANIMAL LIFE. 



4. Why do they sometimes " migrate " ? 



5. What enables the grasshopper to sustain itself for 



so long a time in the air when migrating ? 



6. What becomes of the grasshoppers in the fall ? 



7. How is next season's supply of grasshoppers pro- 



vided for? 



8. Can you drown a grasshopper by holding its head 



under water? 



9. What modes of locomotion are optional with the 



grasshopper ? 

 10. Can a grasshopper alight where it wants to when it 

 jumps ? 



6. THE METAMORPHOSIS OF A MOTH. Cecropia. 



A. The Cocoon. 



The cocoon is a case enclosing the developing insect. 



1. Where do you find these cocoons out of doors? 



2. When is the best time to collect them ? 



3. How would you recognize them? 



4. How can you tell whether the insect inside is alive? 



B. The Pupa. (Use preserved material.) 



The pupa is the developing insect found inside the 

 cocoon. 



1. What is its color? 



2. Its shape? 



3. Identify, — ■ 



(a) the head, thorax and abdomen ; 



(b) the rudimentary wings ; 



(c) the mouth parts. 



C. The Imago. "Moth." 



The imago is the adult form and develops directly 

 from the pupa. 



