INSECTS 31 



24. Relatives of the grasshopper. Other insects that have 

 structure, habits, and life history similar to those of the grasshopper 

 are the crickets, cockroaches, katydids, and walking sticks. 



The cockroaches are more commonly known in New York City 

 as " Croton bugs " from the fact that they frequent places close to 

 water pipes through which Croton water is carried. They are very 

 fast runners, as any one knows who has tried to catch them, and 

 their bodies are so thin that they can easily hide away in narrow 

 cracks. Their sharp jaws enable them to feed upon dried bread 

 and other hard food (Fig. 18) . 



Katydids and walking sticks are striking examples of protective 

 resemblance; that is, they resemble their surroundings in form or 

 color so closely that they may secure protection from their enemies 

 by this means (Fig. 21). 



III. BEES AND THEIR RELATIVES 



25. A study of the bumblebee. (Laboratory study.) 



A. General survey. 



1. Give the names of the regions that you find in the 



body of the bee. (See 20, A.) 



2. State the number and situation of the antennae. 



(See 20, B.) 



3. How many compound eyes are present, and where 



are they situated? (See 20, B, 3.) 



4. (Optional.) With the help of a magnifier look for the simple 



eyes on the top of the head and between the com- 

 pound eyes. How many simple eyes are there, and 

 what is their color ? (See 20, B, 4.) 



5. Examine the legs and state 



a. Their number, and the region of the body to which 



they are attached. 



6. The relative size of the different pairs. 

 c. Their adaptations (by structure) for walking. 



