Oak scale

oak wax scale

noun
See under pit scale.
Also called oak scale.
Dictionary.com Unabridged

pit scale

noun
any of various small oval-shaped homopterous insects of the family Asterolecaniidae, the female members of which have their bodies embedded in a waxy mass, as in the destructive Cerococcus quercus ((oak wax scale) or (oak scale)) or covered with a waxy film.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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