ece3514-sup-0001-FigS1.epsimage/eps846KFigure S1. Bayesian 50% majority-rule consensus tree of the mtDNA gene cytochrome oxidase I sequence data. Yellow and orange represent northern and southern G. pennsylvanicus haplotypes and blue and green represent northern and southern G. firmus haplotypes, respectively. Values on the branches correspond to the Bayesian posterior probabilities. The tree includes all samples from Willett et al. (1997) and Maroja et al. (2009a), plus an additional 130 crickets from 13 localities across the hybrid zone (Table S1) and 119 crickets from 31 localities within the Pennsylvania hybrid zone (Table 1).
ece3514-sup-0002-FigS2.epsimage/eps596KFigure S2. Distribution of morphological clustering membership coefficients for males (r = 1.25) and females (= 1.5) for each collecting locality. Dissimilarities in morphological traits between individuals (males: body size and tegmina color; females: body size and ovipositor length) are calculated using squared Euclidean distances (fuzzy c-means). Collecting localities are ranked by the average clustering index, with Gryllus firmus localities at the top-left and G. pennsylvanicus localities at the bottom-right.

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