Macromoths of Northwest Forests and Woodlands

Phyllodesma americana [Lasiocampidae]

Wingspan 3.6 cm. Forewing is red-brown with fine spots and a deeply notched anal margin; hindwing is small with a dentate margin. This lasiocampid is common and widely distributed in western North America. Moths fly in late spring to early summer. Caterpillars are generalist feeders on the foliage of flowering trees and shrubs, particularly alder (Alnus), snowbrush (Ceanothus velutinus), chinquapin (Chrysolepis chrysophylla), and oak (Quercus).

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