CHAPTER VI. 
SOME INSECTS CLASSIFIED. 
The Bluebottle Fly. Expose a piece of fresh meat 
in a sunny place for a short time and these flies will 
collect on it. Capture some of the flies and observe 
them carefully. 
How does the fly feed ? You can study the mode 
of feeding of the common house-fly by fastening a piece 
of sugar to a slide and placing it under a microscope 
in a place where flies are plentiful. 
What kind of food does a common house-fly prefer ? 
How do you know ? 
Devise an experiment for determining what kind of 
food the house-fly particularly likes. In experiment¬ 
ing with foods try sugar, honey, salt, pepper, water, 
and other substances. 
Does sight or smell seem to guide the fly to its food ? 
How does a low temperature affect flies ? How do 
you know ? 
Plow do the flies make their buzzing ? 
Keep a few bluebottle flies under a tumbler with a 
bit of meat until eggs are deposited. Remove the flies 
and watch the development of the eggs. Does the fly 
have complete or incomplete metamorphosis ? 
How many wings has the fly ? 
How many segments has the fly’s abdomen ? 
See if you can find a winglet behind the wing. 
Using a lens, do you find a pair of balancers behind 
wing and winglet ? 
Is one of the segments of the thorax larger than the 
rest ? 
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