In 1981 Eric Cutter developed the idea of the E/C Caddis. That fly prompted the development of several other caddis flies tied with a parachute hackle wrapped under the wing and front part of the Elk hair.*  After him Eric Otzinger came up with the Hot Creek Caddis, intended for the stream of that name in the Sierras.

We’ve used it with good results in some streams we fish (mainly in Germany). This is the Hot Creek Caddis:

* for a detailed description of those: there is a great article at http://stevenojai.tripod.com/eccaddis.htm