Earwigs

Forficula auricularia

Earwigs are identified by the characteristic pincers at their tail end. Though they are very common in gardens and do occasionally chew on beans, cauliflower, corn (especially tassels), cucumber and tomato plants (as well as some fruit and flowers), they aren’t usually a big enough problem to do anything about. Offsetting any damage they might do is the fact that they also eat aphids, snails and many other small creatures.

Earwigs like to live in damp organic matter, such as mulch and in the right situations they can become quite abundant. If they become a problem (this sometimes happens in the greenhouse) you can trap them by leaving out rolled up newspaper or corrugated cardboard, where they will hide during the day. 

Image: Whitney Cranshaw, Colorado State University, Bugwood.org