Proportion of An. gambiae genome estimated in multilocus genotypes ( N = 353 SNPs) estimated by STRUCTURE. Samples are categorised as: ‘pure’ An. gambiae or An. arabiensis from IGS and SINE diagnostics, and non-outlier status in terms of their proportions of the appropriate genome (top and bottom rows); outliers from the pure species (second and fourth rows) or hybrids (solely) from IGS and SINE diagnostics (middle row). *statistically significant genome mixture detected by BAPS; †marginally non-significant genome mixture. Note that although BAPS and STRUCTURE admixture coefficients were strongly correlated for significantly mixed individuals (Pearson’s r = 0.998, N = 22) the relationship between likelihood of significance and the estimated average level of genomic admixture is not expected to be perfect.