Leavenworth, Chelan County, Washington, USA August 3, 2020 Size: ~5 mm
Found cocoons in 8 mm hole (wood block) in front of Mason bee cocoons in Oct 2019. Cocoon partitions and separating material included resins, sand, wood chips, plant seeds and (plant?) fibers. Hatched out 8/3/2020. Pic of cocoons added.