"Hisserdude" on Roachforum.com caught a female Parcoblatta (looks like Parcoblatta americana) as a sub-adult from southwestern Idaho, Boise Idaho. I have read that there are no native roaches in Idaho, Montana or Wyoming from here: http://insectexpertphd.com/cockroaches.aspx
He has allowed me to post some of his pictures of her on my blog, here:
He has allowed me to post some of his pictures of her on my blog, here: