The Ecumenical Sunday Sunflower Service for Bees

This past Sunday I was out taking pictures of the sunflowers and noticed four different species of bee on this particular blossom. All bees seemed to be getting along fine. Several of them are species I hadn't noticed before.

In the upper left was a Long Horned bee, Melissodes  Subgenus Eumelissodes. It was a fat bee about the size of a honeybee, with legs covered in yellow pollen.

In the upper right, there was a little green sweat bee. I've seen them before.

 In the lower right was a little bee that is new to me, Pseudopanurgus.

 And closer to the center was the familiar honeybee.