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).
Patcrisci on Mar 9, 2010March 9th, 2010, 11:40 am EST
i don't put much stock in hatch charts, but as hatch charts go, this is as reliable as any. it's a good guide to what you can expect in a typical season. I used to fish there quite a bit back in the 90's and they had great hendrickson and caddis hatches in spring. I also recall heavy sulphur and in late season, white fly hatches. hope this helps http://www.fishdoodle.com/housatonicriver.html