Table S1Hylaeus and crop content identifications. Bees were collected as part of other projects or as voucher specimens

Table S2 The composition (identity and proportion) of samples for mixed pollen analysis

Table S3 Mean pollen purity measures and BLAST scores for vouchers and mixed pollen samples

Table S4 Pollen purity analysis using Wilcoxon Signed Rank test of the 18 mixed pollen samples that yielded BLAST matches

Table S5 Pollen purity assessments for Hylaeus pollen loads

Table S6 Ambiguous base locations of crop pollen samples with more than 1 ambiguous base

Appendix S1 Protocols for analyzing mixed samples and deriving pollen purity criteria used for assessing the identity and number of contributing sources to pollen samples.

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