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A genus of lice classed with the aphidae, which feed as parasites on different kinds of plants. The most notd species is an injurious pest to the vine. This form is native to North America, where it was first observed in 1854.


lice, Phylloxera


B. P. Holst The Teachers' and Pupils' Cyclopaedia (Kansas City: The Bufton Book Company, 1909)


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