Small Ermine Moth and Web of Caterpillars
The front wings are the small ermine moth are white or gray with numerous small black dots. The lower wings are darker and uniform. The small moths usually do harm to trees and shrubs.
GalleriesLepidoptera: Moths and Butterflies
Nicholson, George The Illustrated Dictionary of Gardening, Div. VI (London, England: L. Upcott Gill, 1884)