Asian lady beetles.

To differentiate from Mexican bean beetle, observe their eating habits. Mexican bean beetles eat plant material/leaves, lady beetles eat aphids.

I haven't been able to catch a single one eating, that was my first thought.. I've been trying to figure out what these are for a couple weeks now. But thanks.

Here are many pictures of Mexican bean beetles. Notice that the first section behind the head is plain -- that is no markings.
http://www.google.com/search?hl=en&sugexp=les%3B&cp=14&gs_id=6d&xhr=t&q=mexican+bean+beetle&newwindow=1&bav=on.2,or.r_gc.r_pw.r_qf.&biw=819&bih=451&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=buRfULfGPKWViQKP04CwCg

Your beetles have a "W" on the first section behind the head. That W-mark is characteristic of Asian lady beetles.

Stop worrying & be happy.

Here is a link that might be useful: Mexican bean beetles