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than the males, continue to hatch in a very gradual manner, some 
unhatched eggs being found under the scales all through the 
month of August, and as late as the middle of September, at 
which time I found a considerable number of scales, with from 
two to six unhatched eggs. But before the close of this month, 
the females from the eggs first hatched have completed their de¬ 
velopment, and have begun to deposit their eggs for the next 
Spring’s brood. So that there is an almost continuous brood of 
these insects throughout these two months. I cannot perceive 
what is gained in the economy of this insect by this protracted 
hatching of the Summer brood—since the product of this brood 
all hybernate in the egg state—unless it be to baifie the opposi¬ 
tion of mankind. For if they had this end expressly in view, 
they could not pursue a more effectual course, since it follows that 
at whatever time we make our applications for the purpose of des¬ 
troying them, some of them will elude our assaults. If we make 
our applications early, the unhatched eggs will be safe beneath 
the maternal scale. If we make them later, those first hatched 
will have found protection under the scales of their own forma¬ 
tion. The unsatisfactory results of my own experiments go to 
confirm this view. 
On the 6th of August, that is at about the close of the hatching 
of the male-producing eggs, I applied to two branches of a badly 
infested tree, a wash, composed of common fish brine, diluted at 
the rate of one pint to two gallons of water, and to two other 
branches, the same wash, but of double the strength. Again, on 
the 23d of August, after the greater proportion of female produc¬ 
ing eggs had hatched, I applied to other branches, soap-suds of 
the strength of one gill of soft soap to a gallon of water. I also 
wet a branch with water and dusted it thoroughly with unleached 
ashes. 
Upon examining the leaves upon these several branches, late in 
the Fall, I could not perceive much difference in the result of the 
different experiments. Upon all of them could be seen, still adhe¬ 
rent, the dead and discolored remains of a considerable number of 
small individuals whose development had been arrested whilst in 
the incipient larval state, and also a larger number which had at¬ 
tained their normal growth, the washes having failed to reach 
them for the reasons above stated. It did not appear that any of 
