Identification: Covell, Moths of Eastern North America, Page 67. Moth is very similar to Virginia Tiger Moth, but much smaller. The wings are white; pattern varies from no spots at all to heavy grayish-brown spots on the forewing and 1 to 2 blackish spots on the hindwing.
The Fall Webworm is a pest that attacks ash, hickory, maple, oak, and walnut trees, as well as apple trees in neglected orchards. Communal webs built by larva may be seen at the tips of branches.