Brachyopa vacua (Osten Sacken, 1875), the Yellow-spotted Sapeater, is a rare, species of syrphid fly.

Thorax with yellow hair and a double row of dark median lines.

The pupal spiracles are reddish-brown, conical, and curved outward, bearing numerous small tubercles around the sides and with one at the apex.

The larvae were taken from the juice of decaying fungi under dead bark of a tulip tree.

[6] Source:[7] Utah, Minnesotans, Iowa, Kansans, Missoula, Illinois, Michigan, Pennsylvania, Tennessean, Georgia, Virginia, Maryland, Massachusetts, Connecticut Ontario, Nunavut, Québec