109 
notion that the principal injury to the trees was done by these last 
year’s females, and that if they were removed the damage would be 
arrested. The real injery, I need not say, is done later in the sea¬ 
son by the young hatching from the egg masses which make these 
females so conspicuous in spring and early summer. It is possible, 
however, that the method is a valuable one, as the washing away 
of the eggs before hatching, may not improbably result in the des¬ 
truction 0 of many of them. The young which hatch upon the 
ground would doubtless, most of them, make their way back to the 
tree but if the rubbish beneath the tree were raked and burned 
after the egg masses had been dislodged by the water, the multi¬ 
plication of the pest might probably be kept below the limit of in¬ 
jury. ' 
TSince the above was written, I have received from Mr. S. M. 
Dunning, of Chicago, who thoroughly tried the hydrant method last 
.Tune twigs of a maple tree from which the egg masses had' been 
carefully and completely washed off. The under sides of these twigs 
were well covered, in March, 1885, with half grown females, ^scarcely, 
if at all, less abundantly so than was to have been expected it no 
treatment had been applied. The nearest other maples were across 
a dusty city street, and it is scarcely likely that the young were 
conveyed so far. A box elder in the same lot which was also at¬ 
tacked by the bark lice, but not treated, may have divided its par¬ 
asites with the maple; but, curiously, this tree had this spring 
fewer lice than the maple above mentioned. It is, therefore, 1 - 
probable that the mere dislodgement of the egg masses with the 
water jet had any real effect on the numbers of the young lice. n- 
deed it may have easily done more harm than good by destroying 
w thin the egg masses the larva of the Coccinellid* to whose mul¬ 
tiplication we have to look for the principal check on the^orease 
of the next brood. This is, perhaps, the explanation of the interior 
abundance of bark lice upon the box eider, as jus men lonei. 
struction of the egg masses by burning, after dls od f ing the ,“ I ^ 
water, seems to be necessary to any promise ot mler 
method. Further experiment is needed, however, and will be nnclei 
taken the coming season.] 
2. The Oblique-Banded Leaf Holler. 
(Gaccecia rosaceana, Harris.) 
This nearly omnivorous species (not 
from the maple), was by us found rolling the ' month 
c arpum in May, pup* and larv* collected on the 20th of that montn 
emerging from July 9 to 18. 
3. Pandemis lamprosana, Robs. 
Order Lepidoptera. Family Tortricid.®. 
(Plate XI. Fig. 3.) 
Among the leaf rollers upon the maple collected May 10, was one 
of which we kept no description, which resulted m an g 
Pandemis lamprosana. 
