Camel spider, also known as sun spider, usually are found in arid climates but have been found in other areas in the US...
The places where you are most likely to encounter a solifugae/Camel spider is: California, Texas, Colorado, Nebraska, New Mexico, Texas, Wyoming, Oklahoma, Nevada, Montana, North Dakota and South Dakota.
https://ca.answers.yahoo.com/question/index?qid=20120909154656AAxBMwa
Apparently non venomous but bites are pretty nasty with primary concern of infection.
They are beneficial in that they do eat other pests...