Nymph of a hairy chinch bug

6966.          Million of them in the backyard, are they harmful? Waterloo, On. Canada

Number 6966. This appears to be a nymph of a hairy chinch bug, Blissus leucopterus hirtus (Hemiptera/Heteroptera: Blissidae). These can cause damage to lawns/turf;  Click here for more detailed information.