I refined the Google search and came up with this:
Tom Ellis, MSU Dept of Entomology
I had one of these beetles crawling around on my arm, and I think it bit me. Do they all bite?
Some bite, most do not. Sometimes the Asian lady beetles bite skin, but often this stinging sensation is actually caused by small spurs on the beetle's legs pricking skin as they move and evaluate whether or not the skin is a food source. The beetle does not carry disease nor does it have any toxin associated with its mouthparts. In most cases, the pain is short lived. If the bite concerns you, apply antiseptic to the site.