Essostrutha laeta is a species of flat-faced longhorn beetle in the family Cerambycidae, belonging to the tribe Desmiphorini. Like other longhorn beetles, E. laeta is notable for its elongated body, long antennae, and preference for wooded habitats. The larvae of E. laeta are wood-borers, meaning they bore into and feed on the wood of trees and shrubs. They play a role in decomposing dead or decaying wood, aiding in nutrient cycling in forest ecosystems.