THE BAGWORM. 9 
of this method under such circumstances was given by a former 
Government entomologist at a conference on the gipsy moth in 
1891. He said that he once tried to protect a cedar tree not more 
than 6 feet high, upen his own grounds at Washington, by hand pick- 
ing. He worked during two consecu- 
tive months picking off small bags 
from that tree, the progeny of not 
more than two females. Almost daily 
he went to the tree and found fresh 
specimens which he had overlooked 
the day before. For evergreen trees, 
therefore, an arsenical spray is the 
best remedy. Injury by the bagworm 
on large trees has been absolutely 
stopped by spraying with Paris green 
at the rate of 1 pound to 150 gallons 
of water, the trees being completely 
rid of larve. It is easier to reach the 
bagworms on evergreen than on large- 
leaved deciduous shade trees, such as Fic. 10—Chalcis ovata: Adult. En- 
maple and elm, but if carefully car- Be state guar EL Mit, 
ried out, spraying will result in the destruction of the bagworms, so 
that the collection of the bags in winter will not be necessary. Arse- 
nate of lead at the rate of 1 pound of the prepared paste form to from 
25 to 50 gallons of water will be found even more effective than the 
Paris green, as its 
greater adhesive- 
ness renders it 
less likely to_ be 
washed off by 
rains, which in 
some seasons fre- 
quently occur al- 
most daily at the 
time when the 
larve are begin- 
ning to work. 
Fic. 11.—Dibrachys bowcheanus: Adult female and antenna of Arsenate of lead 
male. Much enlarged. (From Howard.) is not at all likely 
to produce scorching of the foliage of shade or ornamental trees or 
shrubs. Its natural adhesiveness is enhanced by the addition of about 
the same quantity by weight of resin-fishoil soap as of the arsenical 
used. 
