Abstract
The presence of extractable semiochemicals for mate attraction is demonstrated experimentally for the first time in Anabolia bimaculata (Walker), Hydatophylax argus (Harris), and Nemotaulius hostilis (Hagen), three species of limnephilid caddisfly. Each species is also the first member of its respective genus to demonstrate pheromone presence. Sex pheromones appear to be wide- spread within the Trichoptera, although < 1% of species have been tested and there remains substantial research still to be done on pheromone demonstration, chemical composition, and release behavior.