The Evolution of Communities 



227 



14 '15 '16 '17 '18 '19 '20 '21 '22 '23 '24 '25 '26 '27 '28 '29 '30 '31 '32 '33 



YEARS 1914-1933 



Fig. 98. Percentage of parasitizatioii of the Mediterranean fruit fly in Hawaii 

 from 1914 to 1933 by four parasites indicated on the chart. The total parasitiza- 

 tion did not go below 24.9 per cent, or above 56.4 per cent. (Adapted from 

 Willard and Mason.) 



