180 INSECTS, AND THEIR RELATION TO MAN 



2. Explain any advantages apparent in the cases of the 

 " walking stick " and the kallima. 



Note. When an animal's color, shape, and markings cause 

 it to harmonize with its usual surroundings, it is said to be a 

 case of general protective resemblance. What is the difference 

 between mimicry and protective resemblance ? 



b. Aggressive Resemblance 



Observations. 1. Notice the terrifying attitude of a tomato 

 worm larva. In what way does it terrify ? 



2. Many insects, when disturbed, lift the hind part of the 

 body or threaten to sting, although they have no sting. 



Conclusion. Of what advantage is it that some insects 

 assume terrifying attitudes? Note. Animals that adopt a 

 terrifying or fighting attitude are said to be examples of 

 aggressive resemblance. ' 



c. Mimicry 



Observations. 1. Study the example of the inedible mon- 

 arch and the edible viceroy. Which one mimics the other? 



2. Compare a flower fly with a honeybee. What do you 

 observe ? 



Conclusions. 1. What advantages to the butterfly that 

 mimics the other ? 



2. How might a flower fly be protected from its enemies ? 



3. Do you think an insect intends to resemble another one. 

 If not, then how might this state of affairs come about ? 



d. Communal Life 



Observations. 1. Explain the community life of the honey- 

 bee. How many different kinds of individuals in a colony ? 



2. Give other examples of animals leading a communal life. 



Conclusions. 1. Of what advantage is communal or society 

 life to an animal ? 



2. Show whether or not there is division of labor here. 



