Wooly Aphid

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Eriosoma Imbricata. Found very abundantly on birch in Maryland in October. These insects cluster together on the twigs, and have the appearance of many small spots of snow-like wool or down moving up and down by jerks, the hinder parts of the insect being covered with this downy secretion.


Report of the Commissioner of Agriculture of the Operations of the Department for the Year 1876 (Washington: Goverment Printing Office. 1877) 39


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