If it has eight legs, that makes your creature a spider not an insect. (Or a lobster or crab, but I am assuming you are not speaking of shellfish.) Beyond that, more detail is needed regarding:
pseudoscorpion
You need to be much more precise. Insects have 6 legs. Spiders and other arachnids have 8 legs. Millipedes and centipedes have many more.
a centipied. they can also be in the colours of magenta and black
Ants Earwigs have the pinchers or "cerci" at the back end.
Sounds like a house centipede.
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