70 
up their homes and scatter their treasures as to make it im¬ 
possible for the ants to reestablish themselves or to collect the 
plant-louse eggs again. This supposition we shall presently test 
by treating in this manner a strip of land through an infested 
held and watching deA-elopments next spring. 
In conclusion, I ought to say that in reporting these results 
I am acting only as the spokesman of the office, and that the 
main credit for the work done and much of that for the selec¬ 
tion of methods and the devising of expedients should be dis¬ 
tributed among Messrs. Garman, Weed, Hart, Marten, and 
Mally, all of whom, while acting as my assistants, have made 
important contributions to this subject. 
