152 
in the face of the fact that the infestation started in a thickly 
populated suburb of Boston. The establishment of these two 
insects in different parts of the United States would soon lead to 
their general spread throughout the country. .What this woulc 
mean in cost and damage, and also in human suffering, can hardly 
be estimated. Only a portion of the New England States is now 
invaded by these insects, and yet the expenditure in clean-up and 
control work alone amounts to more than a million dollars a year 
jor 
by the States concerned, in addition to an aiding Federal appro- 
priation of upward of $300,000 annually. 
