4 A GUIDE FOR THE STUDY OF ANIMALS 



10. Look up the story of the pupa of the house fly ; the development 

 and work of the botfly ; of the ox-warble ; of the tsetse fly. 



Suggested drazving. 

 a. The maggot or grub, side view, x 4. 



THE LIVING COCKROACH 



Materials. 



Individual specimens in cages, jars, or wide-mouth vials 

 with cotton stoppers to admit air. Several roaches in large 

 cages with material for food and concealment. 



Observations. 



1. What is the general color and the average size of 

 cockroaches } 



2. During what time of the day are roaches most active .? 

 Where do they hide at other times .'' How do their shape 

 and color aid concealment .■' Note any odd or striking 

 colors or marks which might make them distinguishable to 

 their mates. 



3. Is the roach a quick or a slow moving animal .? How 

 does it get about, — by running, jumping, walking, crawling, 

 swimming, or flying ? Turn your specimen on its back 

 and see how it recovers its proper position. Notice the 

 relative size and development of the wings and their use in 

 flying. 



4. If uninjured, your specimen has six legs. Why don't 

 they step on each other } Notice the stiff hairs on the legs 

 and the white pads under the feet. How would these 

 structures be useful to the animal .' 



5. The large, black, shiny eyes are on the front and 

 sides of the. head; the long "horns," or feelers, are at- 

 tached just below the eyes. Upon which sense, sight or 

 feeling, do you think the roach depends more } Explain 

 your statement. 



