Scott - I tye a similar style pattern which was based on the "Henwing Emerger" (also known as March Brown Henwing Emerger/Pages 85 & 234/Hatch Guide for New England Streams by Thomas Ames Jr.). The original style was created by a gentleman named George Schlotter, who ran the Anglers Nook on Rt. 313 in Shushan NY. There was a magazine article about the henwing emerger style in the 2006 edition of "Flyfishing & Tying Journal" (Spring 2006 Edition/Pages 62 thru 64). The original article was called "Curious George", written by Thomas Ames Jr. There was a very interesting comment about how Mr. Ames fishes the henwing style fly.
He writes:
"When the late afternoon hatch begins, I tie on one of George Schlotter's Henwing Emergers. By smearing floatant on the wing only, I can hang it in the surface film just like the clumsy natural, laboring to shed its shuck. Bigger fish often ignore the more exposed, high floating duns in favor of slightly submerged emergers."
I need to remember this when I get to fish these flies. I like the idea of fishing the fly as an emerger. A really wonderful article, which has stuck in my head even after a few years. I wish I could find that magazine article again. I'd post a copy of it for reference.
Here is the bastardized version I tye:
Lime Henwing & Herl
Hook - Daiichi 1510/Size 8
Thread - Pearsall's Silk (Green)
Hackle - American Specked Hen Back (Caddis Green)
Rib - Fine Copper Wire
Body - Peacock Herl
Tail - Hen Hackle Fibers (same as hackle)
The Dette Fly Shop sells cool isonychia and hendricson variations of hen wing flies:
A March Brown version of the Hen Wing fly is listed in "Trout Flies for the 21st Century: 200 Essential Patterns that Catch Fish" By Dick Talleur
https://books.google.com/books?id=zbZXo ... 22&f=false