List of mapped characters.

The specializations are S, specialist and G, generalist. The state used in the main analysis (Distribution II) is shown in bold, that used in Distribution I is shown on the left in parentheses, and that used in Distribution III is shown on the right. The hosts are LS, Lasioglossum sensu stricto; LO, Lasioglossum other; H, Halictus subgenus Halictus; S, Halictus subgenus Seladonia; A, Andrena; C, Colletes; P, Perdita; and M, Melitturga. If unspecified, information on specialization and hosts is adopted from Bogusch and Straka [39].aEickwort [57], b Danforth [56], c Mike Arduser personal communication, d Blüthgen [55].