Below Viewing Platform on Burk Trail flying around the colony of Drury's Long-horned Bee (Melissodes druriellus).
Active colony of Drury's Long-horned Bee (Melissodes druriellus) being parasitized by Goldenrod Longhorn-Cuckoo Bee (Triepeolus pectoralis). Last picture appears to show Triepeolus attacking Melissodes.
ID by John S. Ascher at BugGuide
identified by John S. Ascher at BugGuide. Numerous on sandy areas of old logging road through mixed forest.
Foraging on Gaillardia