not very good cell phone photos, but ID'd based on yellow band on 3rd tergite.
I counted 11 brown-belted bumbles in the milkweed. Pollinator counts super low this year
q.v.:
Bombus bimaculatus
Bombus griseocollis
Bombus vagans
On Lance leaf coreopsis
One of the largest bumblebees to show up in the garden this summer. 1+ inch
Bee with possible Formica fusca on Tetradymia canescens