Statistics (mean ± se and [95% confidence interval]) for genetic and chemical analyses of the four supercolonies defined from behavioural assays.

SC-1: nests YM-13, YM-18, YM-19, YN-22, YN-23, YU-01, YU-02, YU-12, YU-24, YU-40, YU-41, YU-42, YU-43.SC-2: nests YS-31, YS-32, YS-33, YS-34, YS-35, YS-36, YS-37, YS-38, YU-03, YU-04, YU-05, YU-06, YU-07, YU-08, YU-09, YU-10, YU-11, YU-25, YU-26, YU-27, YU-39, YU-44.SC-3: nests CA-52, CA-53, CA-54, CA-55, CA-56, CA-57, CA-58, CA-59, CA-60, CA-61, CA-62, CA-63, CA-64, CA-66, CA-67.SC-4: nests AK-86, AK-88, AK-91, AK-92, CB-70, CB-71, CB-72, CB-74, CB-75, CB-76, CB-77, CB-79, CC-80, CC-83.A: number of alleles; Ar: allelic richness; H: gene diversity; f: inbreeding coefficient; Fst: Wright's measure of population subdivision; I: Nei index; E: Euclidean distance.