This group covers a handful of large Lasioglossum species with white hair bands. They are moderately common through the summer, though perhaps easiest to find in the late fall. Most won't be identifiable from photos, though males of at least two species might be. Some species formally placed in subgenus Lasioglossum have now been moved to the subgenus Leuchalictus, but are covered here for simplicity.
SUbGenus Level ID
Females in this group have bold white hair bands on the top of their middle abdominal segments. Males have long jaws and large heads, often with a yellow mark on the clypeus.
Similar genera: Furrow Bees (Genus Halictus)
Two common species in the subgenus Leuchalictus are superficially very similar to the Lasioglossum subgenus.
White-banded Sweat Bee (Lasioglossum leucozonium) – Thought to have been introduced from Europe many decades ago.
Bull-headed Sweat Bee (Lasioglossum zonulum) – Thought to be native across the northern parts of North American and Europe.
The two species below are the most likely in this group to be identifiable from photos, and even then, only males (which are active late in the summer).
Unless otherwise specified, specimen photos in the grid are courtesy of Margarita Miklasevskaja at PCYU with funding from NSERC-CANPOLIN.