Help. I need to identify a bug. It’s very tiny, brown/black and has vertical stripes. Ideas please.

By on June 22nd, 2008

For several years I would find these tiny bugs (about 1/8″) on my kitchen counters occasionally. They were always dead & looked almost like the shell of a bug. They were so light you could easily blow them off the counter. Now I’m seeing lots more of them - & these are alive. Seen mostly at night, all over the house. They fly & when they land they look like a piece of lint or something. I killed one last night & noticed the wings hang off the back of the body just slightly. Hard to see the details they are so small, but they are brown/black & have vertical stripes. When you squish them sometimes they bleed, sometimes they don’t. They fly really fast. They have a black head, no antennae.My windows are open a lot so maybe they come in thru the screens. We are in CO & they are driving me nuts. I can’t figure out if they bite or not - but after 3 days of looking all over online, I can’t figure out what they are. Can someome please help me figure out what they are. Please.
BTW - I’ve tried to take pictures of it but because it is so small and flies so fast, you can’t see it while it’s flying and when it’s sitting on something, it looks like a black dot. Same thing if you try to take a pic of it when it’s dead.

Another 2 days spent looking online and I just can’t find it. I’m almost positive it’s a common bug (even tho I never saw it before living in this house) - but I can’t find any pics of it online.