Acknowledgements
The authors acknowledge Steve Bogdanowicz, the Cornell Evolutionary
Genetics Core Facility, the Cornell Lab of Ornithology, Bronwyn Butcher,
and the Lovette Lab for help in method development and for providing lab
space and time. Dave Moeller and Indrani Singh helped with bee
identification and provided helpful natural history knowledge, and Amy
Hastings helped in DNA extraction methods. We thank Julia Brokaw, who
was instrumental in the field collections of bees and pollen, as well as
Alyssa Anderson, who aided in data preparation. This work was supported
by the National Science Foundation Doctoral Dissertation Improvement
Grant program, grant number 1701675 awarded to ARMJ and MAG, and NSF
DEB-1754299 awarded to MAG.