Tussock Moth, the common name for a family of hairy moths that are typically whitish or brownish. Males have a wingspan of 3/4 to 2 3/4 inches (20 to 70 mm); females of most species are wingless. Males have feathery antennae. Caterpillars of these moths eat the foliage of trees, sometimes causing extensive damage. Adults have no mouthparts and do not eat. The family is named for the usually brightly colored tussocks (tufts) of hair found on the caterpillars. The hair secretes a poisonous substance that causes a skin rash in some persons.

The white-marked tussock moth is common in forests of eastern North America and is a pest on ornamental and orchard trees in the region.

Tussock moths make up the family Lymantriidae. The white-marked tussock moth is Orgyia, or Hemerocampa, leucostigma. Another species is the gypsy moth. .)