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INTRODUCTION TO ZOOLOGY. 



THE WALKING STICK. 



1. Find the parts on the walking stick that you 

 found on the grasshopper. Are any parts missing? 



2. Can you find any ears? Has it any means of 

 making a noise? 



3. The abdomen of the female is thicker than that 

 of the male. The male has a spine on the femur of 

 the hind leg that is much larger than the spine on the 

 female. Is your specimen a male or a female? 



4. What enables the walking stick to escape from 

 its enemies? 



Adtlitioual Facts. 



The walking stick represents the family Phasmidse. 

 The only species common throughout the United States 

 is Diapheromera femorata. 



The walking stick feeds on the leaves of trees and 

 bushes. It resembles the twigs so closely that when 

 resting upon the bushes it is very difficult to see. This 

 resemblance of an animal to some other object is called 

 protective resemblance. 



Make a table after the following form, shoAving the 

 differences between the grasshopper, cricket, katydid, 

 and walking stick. 



