JP, I think that you are right. Assassin bugs are true bugs, true bugs are depicted by the "shield" shaped body.
Moonshae, that is too bad, seeing any kind of bee dead is sad. Maybe the bee died of old age and the bug decided to simply clean up the death. I can't stand the thought that quite possibly it actually killed the bee, but JP is probably right, it killed her. Have a wonderful day still, great life. Cindi