Rather than hijack someone's thread, I thought I would mention this in a different thread.
My understanding, from literature, is that the Kolzer a Firefly series of flies originated in Montana.
I have no personal knowledge so as to verify one way or the other. It is my understanding that a series were tied with differing body colors.
I always find the history of flies, and their origins, to be quite interesting.
For what it might be worth........