What is "bark louse"

Bark louse \Bark" louse`\ (Zo["o]l.) An insect of the family Coccid[ae], which infests the bark of trees and vines.

Note: The wingless females assume the shape of scales. The bark louse of the vine is Pulvinaria innumerabilis; that of the pear is Lecanium pyri. See Orange scale.

alt. 1 Any insect of the family Coccidae, that infest the bark of trees and vines. 2 Any insect of the order Psocoptera, that live on or near trees and feed on algae and lichen. n. 1 Any insect of the family Coccidae, that infest the bark of trees and vines. 2 Any insect of the order Psocoptera, that live on or near trees and feed on algae and lichen.

n. any of several insects living on the bark of plants [syn: bark-louse]