Abstract:
Diagnoses, synonymies, range maps, and an illustrated key are provided
for the six species of Halictus found in the Northwest: H. confusus,
H. farinosus, H. ligatus, H. rubicundus, H. tripartitus, and H. virgatellus.
Observations by Chandler, Dolphin, and Roberts on nesting and foraging
behavior is combined with a review of the literature on the biology of
northwestern species. Abundant as well as aggregatory, Halictus species
have demonstrable value as crop pollinators.
