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Fig. 4. (A). Discriminant analyses of four variables selected by stepwise
discriminant analysis for three groups of L. humile queens each
treated with nestmate queen hydrocarbons (RTP), non-nestmate queen
hydrocarbons (FOR), and hexane (HEX) and (B) discriminant analyses of five
variables selected by stepwise discriminant analysis for two groups of treated
L. humile queens that were either attacked or not attacked by
nestmate workers. + marks the centroid of each group.