“…The former case has been postulated for Acarus siro (Levinson et al, 1989), and the corresponding active compound(s) have been identified in the related species Ac. immobilis as a mixture of hydrocarbons and 2-hydroxy-6-methylbenzaldehyde (hereafter abbreviated as 2,6-HMB), respectively (Sato et al, 1993). As examples of the latter case, female sex pheromones have been identified from the following five species: Sancassania (ϭCaloglyphus) polyphyllae (b-acaridial [2(E)-(4-methyl-3-pentenylidene)-butanedial], Leal et al, 1989a), Aleuroglyphus ovatus (2,6-HMB, Kuwahara et al, 1992), Sancassania rodriguezi (undecane, Mori et al, 1995), an unidentified Sancassania sp.…”