spider index?

Im planning for a summer trip to eastern Oregon to collect some of the wolfspiders and scorpions, and perhaps some widows. Are there any books out there would provide me a list of the insects and spiders that I would find in that area? or any links? I couldn't find anything on the web for some reason.

Thank you!

Uroctonus mordax scropions

well if anyone has been to eastern oregon may be able to give me some pointers, are there any black widows in eastern oregon? and what kinda wolfspiders they have over there? Ive only been there for rattle snake hunt, didn't look for any spiders. And thanks cacoseraph for that scopion info.

In google or yahoo search " Oregon spider checklist." Most states have done this project, which is a complete listing of all species they could find. Some even go county-by-county in defining arachnid populations.