Lasiocampidae

Lasiocampidae, commonly known as lappet moths, is a family of moths in the order Lepidoptera, within the superfamily Lasiocampoidea. Members of this family are characterized by stout, hairy bodies and broad, often drab wings. Many species have lobed or scalloped hindwings, and some genera feature leaf-like wing shapes that resemble bark or dead leaves, giving them camouflage in wooded habitats. The family contains several hundred described species distributed worldwide, with greatest diversity in tropical regions but many temperate representatives as well. Notable genera include Lasiocampa (eggars), Gastropacha (lappet moths), Malacosoma (tent caterpillars), and Trabala.

The larvae (caterpillars) are typically large and hairy and feed on a wide range of trees and shrubs. A hallmark group within the family are the tent caterpillars of genus Malacosoma, which construct silken tents in the crowns of trees as communal feeding sites. Adults usually have reduced mouthparts and a short lifespan, with most species not feeding after emergence.

Life cycle proceeds through egg, larva, pupa, and adult. Eggs are often laid on host plants or nearby substrates and hatch into caterpillars that spin cocoons, in which pupation occurs. Some species overwinter as eggs or pupae.

Ecology and economic impact: Lasiocampids can be defoliators and some outbreaks cause significant damage to forests or ornamental trees, prompting monitoring and, in some cases, management. They are generally harmless to humans and play roles in food webs as prey for birds and other predators.