bark louse Meaning, Definition & Usage

  1. noun any of several insects living on the bark of plants
    bark-louse.

WordNet

Bark" louse`
Definitions
  1. (Zoöl.) An insect of the family Coccidæ, which infests the bark of trees and vines. ✍ The wingless females assume the shape of scales. The bark louse of vine is Pulvinaria innumerabilis; that of the pear is Lecanium pyri. See Orange scale.

Webster 1913