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Annals Entomological Society of America [Vol. XV, 



plants are concerned. Small pieces of twigs, badly infested 

 with scale, were tied to clean, uninfested branches of various 

 trees, each branch being then covered with a bag of fine cheese 

 cloth. In every case the eggs hatched and the young larvae 

 crawled to the new host plants in large numbers. The results 

 of these experiments were as follows : 



Transfers From Apple to Other Plants. 



Transfers From Other Plants to Apple. 



Transfers From Other Plants to Pear. 



