Hatches Made Easy:

Little Short-Horned Sedges (Glossoma sp) - Adults and Fly Pattern


As i mentioned in the pupae section, the Little Black Short-horned Sedges
usually hatch out of the water on rocks or the banks of the stream. The egg
laying activity is about the only time I have found that you have a good
opportunity to catch fish on imitations of this caddisfly.
The female adults dive and paste their eggs on the bottom. They return to the
surface to fly away or die in a spent position on the surface. You will see this
occurring in the riffles and runs. This indicates that you should to be fishing a
wet imitation of the adult to imitate the diving egg layers.
You can also use a spent imitation of the adult. I am certain the trout eat them
but I have had little results imitating the spent caddisflies of this genus. I guess
the reason is that the egg layers die and sink rather quickly. They are already
saturated to some extent when they return to the surface of the water.
I have caught trout on several occasions on a size 20, wet fly (our Perfect Fly
pattern) for those caddisflies that paste their eggs to the bottom. This activity
usually occurs late in the afternoon but much earlier if the sky is overcast. The
later in the year it is, the later in the day they tend to deposit their eggs. There
are usually enough of these that you can easily spot them swirling around a few
inches above the water and hitting the surface. That is where you want to place
your fly. You may see the flash of a trout but for the most part, you will not see
the trout eating the diving caddisflies.
Don't overlook the egg laying activity
of this hatch. You can catch several trout in a short time if conditions
are right.

Fly Pattern Colors:
The larvae look like little grub worms. I doubt that trout feed on the larvae in their
saddle cases, so if you are inclined to tie a fly for them, I would think it should
imitate the uncased larvae. These are very small caddisflies ranging from a hook
size 20 for the females to 22 for the males.

Hook: 20
Head: Dark Brown
Body: Cream
Legs: Brown
Tail: Brown

The pupae swim to the surface and occasionally hatch there but most often they
skitter across the surface to rocks or the banks to emerge out of the water.
Although I have not done well with this pupae imitations, I feel certain the trout
eat them.

Hook: 20
Head: Dark Brown
Body: Dull Orange
Legs: Light Brown
Wing Pads: Dark Brown almost Black
Antennae: Dark Brown

Wet Fly:    
The adults are best described by their name - Little Black Short-horned
Sedges.  I would suggest that you tie a size 20 imitation (size of the females)
because the males don't get in the water very often. Remember that this should
be a wet fly because they dive to deposit their eggs. It could just be a weighted
version of a dry.

Hook: 20
Head: Dark Brown
Body: Yellowish Tan
Legs: Brown
Wings: Grayish Dark Brown
Antennae: Brown

Spent Pattern for the Egg Layers
If not eaten beforehand, all egg laying caddis eventually end up as a spent
winged caddisfly. If you find a concentration of the spend caddisflies you may
want to try an imitation of them. The colors are the same as for the wet fly.

Coming Up Next:
Spotted Sedges (Cinnamon Caddis) (Ceratopsyche sp)

Copyright 2008 James Marsh