2 A GUIDE FOR THE STUDY OF ANIMALS 



Observations. 



Notice the division of the body into three regions : 

 head, thorax, and abdomen. The six legs, the large 

 wings, and the small feelers may be easily found, as are 

 the large eyes, the extensible mouth, and beneath the 

 larger wings the small undeveloped ones looking like 

 tiny knobs. 



1. State the general color of your specimen and give 

 any special markings on its body. 



2. Is the body smooth or has it a covering of any kind } 

 Do you regard the fly as a cleanly animal 1 Why } 



3. Under what conditions does the fly use its legs } its 

 wings } What enables it to walk upside down } What 

 use can you assign to the small wings .-' 



4. Judging by the relative size of the feelers and the 

 eyes, do you think the fly relies more upon its sight or its 

 feeling .' Since the eyes can probably see you any place 

 where you see them, determine through how much of a 

 circle the fly can see. 



5. How does the fly eat? Does it eat solid or liquid 

 food > 



6. Where is the extensible mouth {proboscis) kept when 

 not in use .'' What is the fly doing when " washing its 

 face " .? 



7. From your own observation in the bam and the alley what do 

 you know about the fly's cleanliness in choosing its food ? How 

 would it aifect articles in the pantry? 



8. From the foregoing statements show how flies may be a serious 

 fector in dealing with disease. 



9. What means may be employed as protection against adult flies? 

 against their breeding places and " maggots " ? 



Suggested drawing, 

 a. The entire fly, seen from above, x 4. 



