What is this New England flying insect?

Today I walked again, and one of the insects landed on my pants leg, giving me a chance to get a close look.

It was exactly like the photos of Woolly aphids: a pastel blue body, black head, and transparent/black wings.

Thank you!

David

(deleted)

Interesting. The blue color seems concentrated on the wings, and seems more opaque. But otherwise, this could be it. Thank you!

Ken, Sorry I can't see tiny insects, like fruit flies, I'm over 70. And since I have never seen them land (I think they are flying to mate, not to eat), I can't take a photo. The critters appear throughout the mid morning and afternoon, not in the evening, and I only see them across the street from where they obviously breed. I see them when I go for a walk. They are only around for a few days each year. The blue of their wings is just about all I can see of them, even when they fly near my eyes. It is a distinctive pastel blue, almost glowing with color whether viewed in sunlight or shade, much like the color of a tiny flower.

Some books on birds or flowering plants group them according to color. Although many insects are just the drab color of their exoskeletons, it might be useful to index them also by wing or body color. For example, there is a common dragonfly that has a bright blue body, very distinctive. And another example would be the Monarch butterfly, which is bright orange.