The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
Patriot on Sep 18, 2017September 18th, 2017, 3:30 pm EDT
There was a great ariticle in the Autumn 2017 Fly Tyer magazine on the use of these beads by Hans van Klinken (the Klinkhammer guy). Anyway, these beads were about $7 on Amazon, but I accidently found the same bead package for approximately $2.
If interested, here is the link to the bead store: