24 FARMERS’ BULLETIN 564. 
work serves to establish the quarantine line. It is the policy of the bu- 
reau to carry on as much work as possible in the territory along the 
western border, for the purpose of stamping out new colonies that may 
become established and to prevent, so far as possible, further spread 
of the insect in this direction. A large number of men are em- 
ployed on this work, and all the towns along the border were given 
attention this year from Lake Winnipesaukee on the north to Nar- 
ragansett Bay. The work is carried on with special reference to the 
gipsy moth, as it would be impracticable to attempt control of the 
brown-tail moth in this way. 
COOPERATIVE WORK. 
Since work on the gipsy and brown-tail moths was begun by this 
bureau a greater or less amount of cooperative work has been carried 
on with the States concerned. As previously stated, the attempt to 
introduce parasites and natural enemies of the gipsy moth was con- 
ducted cooperatively with the State of Massachusetts for several 
years. Recently this entire line of work has been managed by the 
bureau, it being really a problem in which all the States concerned 
are vitally interested. During the past year Maine and New Hamp- 
shire have assisted in the work of collecting parasitized material and 
liberating it within their borders. The field work and the quaran- 
tine work is also carried on to a greater or less degree by means of 
cooperative arrangements with the States concerned, and since the 
work was first begun the relations with the various States have been 
very friendly and harmonious. Parasites have been liberated in 
greater or less numbers in all of the New England States. 
THE OUTLOOK. 
During the past season conditions in the oldest infested area have 
not been as serious as in previous years. The records show that the 
mortality of the gipsy moth and brown-tail moth caterpillars as a 
result of the attack of parasites, predaceous enemies, and disease has 
been greater than in any of the years preceding. The experiments 
which are being conducted are giving information which will serve 
as a basis for handling infestations more satisfactorily and economi- 
cally, and although new territory has been found infested the out- 
look for diminishing the aggregate amount of damage which results 
from the work of these insects is more favorable than it has been here- 
tofore. It is necessary, however, that aggressive measures should be 
continued in order that the pests may be brought under better con- 
trol. This is of vital importance, particularly to the citizens of 
States where these insects do not now exist. 
O 
