Confirmed at BugGuide as female Bombus griseocollis or “Brown-belted bumble bee”;
http://bugguide.net/node/view/791572
On blue salvia (family Lamiaceae, genus Salvia, I think — checking on that!).
Check out how we get down to this species:
» Insects (class Insecta)
»» Ants, Bees, Wasps and Sawflies (order Hymenoptera)
»»» Aculeata - Ants, Bees and Stinging Wasps
»»»» Anthophila (Apoidea) - Bees
»»»»» Cuckoo, Carpenter, Digger, Bumble, and Honey Bees (family Apidae)
»»»»»» Honey, Bumble, Long-horned, Orchid, and Digger Bees (subfamily Apinae)
»»»»»»» Bumble Bees (tribe Bombini)
»»»»»»»» Bumble Bees (genus Bombus)
»»»»»»»»» Subgenus Cullumanobombus (Bombus Subgenus Cullumanobombus)
»»»»»»»»»» Brown-belted Bumble Bee (species Bombus griseocollis)
Went rowing with Grace today, but not in the same scull: we took two shells. (On my small car; I wish I had a photo of that!) She rowed the “stable” shell for about 40 minutes, while I rowed the “faster” single. We returned to the dock and she went out in the Maas. She did just fine. Quick learner on the arms and hands parts and had great posture. Well done, Grace!
One year ago (“Butterfly bush ‘macro’”):
http://365project.org/rhoing/365/2012-06-19
Two years ago (“Pipevine Swallowtail (corrected)”):
http://365project.org/rhoing/365/2011-06-19 
