This is a preliminary recipe:
The basic Lou Dan is an upside down flashback pheasant tail but can be any nymph that you like. I have them as copper Johns, hares ear nymphs, wooly buggers and soft hackle pheasant tails. It is made of pheasant tail for the tail, body, wing case and legs, peacock herl for the thorax, mylar tinsel (medium or small) for the flash and a wire in green, gold or copper for the ribbing on the body. As the jig head eye points up the flash and wing case have to be tied on what would be the underside of a normal hook but is the to of the jighead hook. I powder paint the lead jigheads with powder paint. Cabelas.com has it in all colors but I prefer watermelon pepper. Dan uses white frequently. The wing case is extended beyond the lead jighead and then bent and tied back to make the legs. I tie them mostly on a # 12 1/100 weight jighead. If I want larger a #10 1/80 weight will also work. Any larger and it doesn't look right.
The water wasp has gold dyed mallard flank feathers for the tail with a few pieces of crystal flash ( I use pearl, Dan uses blue). The thread is black or dark brown (as is the Lou dan), 6-0. The body is wooly bugger sparkle chenille in brown or olvie, a gold wire can be tied in to counter wrap the palmered red-brown hackle. A gold cone bead in medium is used and the hook is a number 10 or # 8. It is tied like a cone head wooly bugger to start. Then tie in some more mallard duck flank feathers for the wings. They can be cut separately or notch out a single feather and tie it in behind the cone weight head. Finally, tie in a partridge soft hackle in front of the wings and behind the cone. I like to cover the thread wraps with a little sparkle dubbing before whip finishing but Dan thinks that lays down the soft hackle too much and takes away from the movement. Good luck.