These tired little bees are Melissodes bimaculata.Which is a type of long-horned bee. I guess after a busy day gathering nectar and pollen it makes even the busiest bee gets tired. I occasionally find these little bees on plants 2 or 3 at a time but never before as many as this picture portrays. I captured this image last summer in some tall grasses near our pond. When we think of insects, if we think of them at all, we rarely think of them napping.