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.
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Other Orders of InsectsSource
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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