Figure S1. Preliminary experimental results for rates of worker mortality induced by thermal and hygrometric stress in two native populations of W. auropunctata.

Figure S2. Measures of genetic differentiation between populations from the native and introduced range of W. auropunctata.

Figure S3. Mortality rates of workers from each of the sampled populations over all tested thermal and hygrometric conditions.

Figure S4. Thermotolerance of workers from each sampled populations for each set of thermal and hygrometric conditions tested.

Figure S5. Relationship between mean thermotolerance and mean body size of workers from six worldwide W. auropunctata populations.

eva12058-sup-0002-DataS1.xlsapplication/msexcel136KData S1. Data from the main thermotolerance experiment & body size measurements.

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