1. I got a few citrus trees yesterday, and potted them with Miracle-Gro cactus, palm, and citrus soil, and this morning I found a few millipedes (I think) crawling around in 2 of the pots. They must have been in the soil and came to the surface after I watered the trees. Will they do any damage? And how can I kill them without killing myself (I do plan to eat whatever fruit I get)? Bah! Now I'm all itchy. 2. These are growing in my yard, does anyone know what they are?