A downy species of aphis, or plant louse, destructive to fruit trees, infesting both the roots and branches; -- also applied to severa…
Its definition shares important concepts with this word: genus, bombycid, moths, caterpillars, leucostigma.
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Orgyia
A genus of bombycid moths whose caterpillars (esp. those of Orgyia leucostigma) are often very injurious to fruit trees and shade trees. The female is wingless. Called also vaporer moth.
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