Little Sister Caddis Pupae (Cheumatopsyche )

The pupae swim to the surface to hatch. They are very available for the trout to
eat at that time. This is the best time to imitate the Little Sister Caddisflies or
Sedges.

The problem is being able to determine when a hatch is underway. Often the
caddisflies are emerging at the same time they are depositing their eggs. If not,
you will probably not notice the hatch or see the fish feeding on them. Trout eat
them as they swim (aided by air bubbles) to the surface. Occasionally the trout
will jump out of the water eating the pupae. The hatch usually happens in the late
afternoon but later in the year, it may not occur until dusk.

Presentation:
Imitations of the pupae should be presented in the same manner as the larva
imitation except that you would not weight the fly as much if any. You want the
fly to swing downstream near the bottom and then rise to the surface.

Stop the swing of the rod when the fly is downstream from your position. If you
determine that they are emerging in a particular area of the riffles then you
would want your fly to end up rising to the surface in that same area. You would
need to wade out in the stream directly above the emerging pupae. You would
have to stay well above the emergers or you would spook any trout feeding on
them. You can let line out in the current of the riffles and not have to make a very
long cast.
Copyright 2009 James Marsh
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