II. MOSQUITO 



Material. Some wigglers in wide-inouthed bottles half full of water, 

 placed on tables where the pupils can examine them at their leisure. 

 Look for wigglers in uncovered cans or pails or barrels of water that have 

 stood outdoors for some days where mosquitoes are flying. In such places 

 any small creatures that swim quickly away from the surface when the 

 water is disturbed are almost certainly wigglers. Keep the wigglers 

 several days for the lessons on pupas and adult mosquitoes. Cover the 

 bottles with mosquito netting to keep the insects from flying away when 

 they become full-grown mosquitoes. 



1. THE WIGGLER 



Observation. What is the size of a wiggler ? 

 What is its shape ? What is its color ? In what 

 part of the water does it usually rest ? Does it rest 

 with its head, or with its tail, downward ? Does a 

 resting wiggler touch any part of its body to the 

 surface of the water? 



Jar a bottle of wigglers. What do the wigglers 

 do? How does a wiggler move its body when it 

 swims ? How long does it remain away from the 

 top of the water ? When it stops swimming does it 

 rise, or does it sink ? Do you think it is heavier, or 

 lighter, than water ? 



Drawing. Draw a picture of a jar of water con- 

 taining wigglers. Draw a line across the jar to show 

 the surface of the water, and then draw some wigglers 

 in the water as you see them at rest. 



OVER. NAT. STt;i>. 2 17 



