THE CANADIAN ENTOMOLOGIST 99 



same is true of Folsom and Merced in the center of the hot interior 

 vailev. Only at Aromas, in one series of black scale on olive and 

 European Fruit Scale on apricot, is the percentage far below the 

 normal, but the black scale on apricot, both there and at Watson- 

 ville a few miles away, the percentage of hatch is very high. 



We are led to conclude that food plant or locality has very 

 little to do with the rate of hatching which this year averaged 

 87.75% for the whole series. 



NO. 

 SCALE PLANT LOCALITY LOTS HATCH 



Black Scale Apricot Aromas 100 .100 % 



" Ontario 100. .97 % 



" Watsonville 100. ...76.8 % 



' Grape Fruit. ..Santa Barbara .600. ...86. 6 % 



Maytenus Berkeley 100 ...96 % 



Olive Aromas 100. .53. 6 % 



" Folsom 300. ..81.1 % 



" Merced 300. .93. 9 % 



Orange Ontario 400. .89. 6 % 



Peach Berkeley 300. .73.2 % 



Prune San Jose 100.. .100 % 



" Lake County. .100... 100 % 



Total 2600... 86. 68% 



European Fruit Scale. ..Apricot Aromas 100 ...52.5 % 



San Jose 100. .98.3 % 



Santa Barbara. 100... 97 % 



Prune Santa Clara 400 .95.4 % 



>San Jose 3600... 89. 85% 



Lake County.. .2600. .90. 99%) 



Aromas.. 100. .80. 6 % 



Anderson 200. ..100 % 



Xmas Berry. Berkeley 7200. 83.67%o 



Total 14400. .87. 41% 



Oak Scale Oak Berkeley 400....97.92%o 



Pine Scale Pine Berkeley 1200. .95. 17% 



Peach Scale Ivy San Jose 1400... 83. 48% 



Grand Total 20000.... 87. 75%o 



University of California, December 31, 1914. 



