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tree, at the fountain head.  They follow up the course of
the root leaving death and deay behind them,  until the period
arives[arrives] when generation becomes again necessary for the perpetuation
of their species.  The Aphis then comes out of the
ground and lays <s>the</s> its eggs in the tender shoots and leaves, thus
completing the cycle of their natural lives, leaving behind
them a progeny so numerous that unless baffled by the skill
of the scientist or husbandman, the cultivation of our
choicest fruit must be abandoned [?]." x x

"Prof. Riley says the insect [the grape Phylloxera]
thrives less, and is therefore less injurious, upon sandy
soil.  I have found the converse of this to be true [for the
peach aphis], and have also found them more numerous upon
clay soil well cultivated than upon the same soil half cultivated;
and a still greater difference when the soil was covered
with heavy sward; and have therefore concluded thaht in a friable
soil, the insects movements are unimpeded, which could not
be the case in heavy sward or compact clay." x x

If Prof. Riley will come to Riverside, and it would
give me great pleasure to have him do so, I will show him
that our insect is no unimportant animal; and, though he is
        