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Rejection and acceptance of S. invicta queens introduced into foreign polygyne test colonies. The different types of queens tested were young, nonfertile queens, including both virgin queens (A) and newly mated queens (B), and fertile queens, including both normal fertile queens (C) and fertile queens manipulated to resemble queens of the alternate form (D). The Gp-9 genotype and social form of origin of introduced queens is indicated under each bar.
