Pheromone, a chemical factor that triggers a social response in members of the same species
Butenandt is credited with the discovery and naming of the silkworm moth pheromone Bombykol in 1959.
The male's pheromone sensory cells are located in tip pore sensilla and respond to touching with either female silk or the synthetic compound of the pheromone.
L. luctuosum are also often confused with the Tapinoma sessile since they have the same coloration, are similar in size, and produce an alarm pheromone with a very similar odor.
Males beetles, which carry the fungus which causes Dutch elm disease, are attracted to the pheromone.
She emits a secretion from the Dufour's gland on her abdomen, named after its discoverer, Léon Jean Marie Dufour, which includes a pheromone which subdues the attacked ants and makes them less aggressive.