To build the South Platte Brassie, wrap the hook shank with red thread (although you could use other colors), leaving the thread at the rear of the shank. The red hue serves as both a simple attractor color, and also imitates the red color of a number of larva. Next, wrap a piece of copper wire (vary the gauge depending on the hook size) from the rear of the shank up to the head, leaving enough space at the head to tie in a throat of brown hackle fibers. Cut off the ends of the copper wire and flatten them against the shank. Now wind the thread forward over the wire, following the gaps between each wrap of wire. Once the thread is at the front of the shank, tie in a half-dozen or so hackle fibers for the throat (more on larger sizes, less on smaller), and then finish the head. That's the South Platte Brassie--simple, but very effective.
Making a very effective pupal imitation is an even easier matter than tying the Brassie. Basically, it's nothing more than a dubbed Antron sparkle-yarn abdomen (dubbed thin) with a dubbed Antron thorax that's picked out with a dubbing brush so that it flows back over the abdomen. The overall effect of this Sparkle Midge Pupa is that of a glimmering, partially translucent, emergent-ready insect. The fly is quite basic, but keep in mind that we're really trying to impress the fish, not other fishermen. And I can tell you that the fish like the looks of this one.