The insects we call "Big Fall caddisflies", "October Caddis" and several other names are all members of the
Limnephilidae family of caddisflies. These are called the "tube-case caddis" because all of the different species within
the family have tube shaped, shelter type cases consisting of an inner matrix of silk and an outer covering of plant or
mineral material. Most of them look like a tiny wood pile, or a pile of sticks, but some are made of tiny pieces of stone or
rocks. The Limnephilidae family is a big one, with 52 genera, or in other words, 52 sub-groups of species that are similar.
Of all the many species within this family, I think only two genera are found in large enough quantities to deserve a
separate fly pattern. Most all of the others exist in sparse quantities, or in only a very few trout streams. That is why we
only have two "Perfect Fly" sets of patterns for them.
Keep in mind, Perfect Fly has far more specific patterns of caddisflies than any other company in the world. We have
patterns for the pupa and adult stages of life for the October Caddis, Dicosmoecus species, found in the western
states, and the pupa and adult stages of life of the Great Brown Autumn Sedge, Psycnopsyche species, found in the
Eastern and Mid-western states. Although a lot of anglers call the eastern species, October Caddis, Giant Orange
Sedge, and other names, most books call them Great Brown Autumn Sedges. The adults found in the east are far less
redish orange in coler than the Great Autumn Brown sedge, although some species do have an Orange tint to them.
Big Fall Caddisflies
Copyright 2015 James Marsh
October, 2015 Issue
he so called, big Fall caddisfly is another common description of several different species of rather large size
caddisflies that hatch in the fall. Just as vague, and non descriptive as Big Fall caddisflies is the use of the term
October Caddis. I guess that means a caddisfly that emerges in October. About the only other description of the large
caddisflies that we commonly see in trout streams coast to coast during the fall months is big brown ones, big orange
ones, etc. So far, I have identified the particular caddisflies this article is being written about in such a vague way, it has
at best, given you just enough information to know its about large caddisflies that hatch in the fall months.
Great Autumn Brown Sedge Adult, hook size 10
October Caddis Adult, hook size 6
Great Autumn Brown Sedge Pupa, hook size 10
October Caddis Pupa, hook size 6
Trout do eat the adults and in some cases, rather well during much of the daylight hours. While this is true of some of the
western October caddis species, it isn't so true of the Great Autumn Brown Sedge, which usually deposit their eggs very
late in the afternoon and early evenings. In both cases, you may not have as much fun but you can usually catch more
trout fishing imitations of the pupa. Trout have a very easy time eating them. They are easy prey when they are accenting
from the bottom to the surface of the stream to emerge and fly away.
Great Autumn Brown Sedge Adult
Brown Trout with Great Autumn
Brown sedge pupa in
Derek Porter with Brown Trout with Perfect Fly Great Autumn Brown Sedge in mouth