Neighbor-joining tree of DNA barcode sequences : Explanation note: A Neighbor-Joining tree of 181 Nearctic Epeolus COI sequences >300 bp in length (no BINs were assigned to sequences <300 bp in length) based on Kimura's two-parameter distance model, generated in BOLDSYSTEMS (http://www.boldsystems.org) and presented in the Multipage Classic format. For each sample, the country and province or state in which the specimen that was the source of genetic material was collected is given, as is the processing ID and (if applicable) BIN. Detailed collection information for each sequenced specimen is presented in Suppl. material 1.