[Lady Lottie]

Sorry - the only thought I had was - ewwwwwwwwwwwwwwwww!    And I have them too!

[peterjf]

milki or centipede , they good in the soil , they eat the little buxxers that eat roots,also enjoy the odd woodlice too , its a gardeners friend

[Salmo]

These are flat millepedes. Most of the time they live on decaying organic matter but sometimes they will attack the tiny roots of just germinating seeds and kill the plants. This happens usually in a dry season. The first sign is that the seeds do not come up. If you dig up a seed there will be a damaged root with tiny brown marks. Bigger plants are seldom affected.

I would not bother too much about them. If there is organic matter they prefer to feed on that.