132 CIVIC BIOLOGY 



Watch for eggs, and examine the water for larvie. How 

 many eggs were laid and how long did they take to hatch? 

 Wherever you have found mosquitoes breeding, indicate 

 it upon a map of the locality with letters, A denoting the 

 presence of Anopheles; C, Culex\ and Y, Aedes. Fig. 61 

 shows the relation between malaria and the Anopheles mos- 

 quitoes as worked out in this way by a biology class. 



FIG. 09. Vivarium set up for studying mosquitoes 

 Cheesecloth top with sleeved opening and glass dish of water in moss at one end 



Did you find that, in general, Anopheles breed by preference 

 in spongy bogs and stagnant water, green with algse ; Aedes in 

 cisterns, tanks, buckets, tubs, rain barrels, flowerpots, saucers, 

 flower vases, and water pitchers; Culex pipiens in ditches, 

 stagnant pools, catch basins, or in any water near homes, 

 indoors or out ? But algae may quickly change any neg- 

 lected water into a green bog hole for Atwpheles to breed in. 



