The Royal Lightning Bug, originated by John Mundinger, is a fun to tie, and proven on the stream, sub-surface attractor pattern.

Royal Lightning Bug
Hook: Grip 12804BL #14 (or equivalent 1XL wet fly hook)
Bead: Tungsten, black 2.3mm
Thread: Benecchi 12/0, black
Wing: Krystal Flash, pearl (or chartreuse)
Body: Peacock herl; flash, red; peacock herl

Video here - please view in HD, if able:

Hans W