**Caddisfly Genus Cheumatopsyche (Little Sister Sedges)**

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Trichoptera (Caddisflies)

» Family Hydropsychidae

» Genus Cheumatopsyche (Little Sister Sedges)

Species in Cheumatopsyche
Cheumatopsyche campylaLittle Sister Sedge	0	0
Cheumatopsyche etronaLittle Sister Sedge	0	0
Cheumatopsyche gracilisLittle Sister Sedge	0	0
Cheumatopsyche harwoodiLittle Sister Sedge	0	0
Cheumatopsyche lasiaLittle Sister Sedge	0	0
Cheumatopsyche pasellaLittle Sister Sedge	0	0
Cheumatopsyche pettitiLittle Sister Sedge	0	0
Cheumatopsyche smithiLittle Sister Sedge	1	12
Cheumatopsyche sordidaLittle Sister Sedge	0	0
Cheumatopsyche speciosaLittle Sister Sedge	0	0

34 species aren't included.

Common Names

Match	Common Name
	Little Sister Sedges
	Little Olive Sedges

Pictures Below ↓

This is page 2 of specimens of Cheumatopsyche. Visit the main Cheumatopsyche page for:

The behavior and habitat of Cheumatopsyche.

Pictures of 6 Caddisfly Specimens in the Genus Cheumatopsyche:

Specimen Page:12

Male Cheumatopsyche (Little Sister Sedges) Caddisfly Adult

View 12 PicturesI didn't identify this one directly, but I eventually identified one of several I collected from the same swarms that appeared to be of the same species. (I lost track of which specimen was which in storage.) The microscope pictures come from one of these specimen, not necessarily the same specimen as the DSLR pictures. They key to Cheumatopsyche, and the hind wing venation (Venation: The pattern in which the veins on the wings of an insect are arranged. It is usually one of the most useful identifying characteristics.) that separates them from Hydropsyche is pretty clear in the attached picture as well as another specimen I checked under the scope.

This specimen was one of tens of thousands we saw on a July 1st evening on the Madison, beginning with big swarms around every vehicle and tree at the Eight Mile Ford access point and continuing all up and down the river bank. We somehow didn't catch any trout, perhaps because they were stuffed with pupae from when these things emerged. Or maybe we just weren't fishing well. Either way, this one represents a major hatch there.

I somehow forgot to photograph this important specimen against the hooks size chart, but fortunately I preserved a few. The body length is about 6 mm, and total length from head to wingtip is 9 mm.

Collected July 1, 2019 from the Madison River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019

Cheumatopsyche (Little Sister Sedges) Caddisfly Pupa

View 3 PicturesI was surprised how bright green this pupa is. It's chartreuse. After collecting it, I experimented with melting down chartreuse jigs and making little translucent rubber caddis abdomens on my flies. They looked good, and the trout liked them, but they weren't very durable at all. This specimen is recently deceased in the photographs.

Collected May 18, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Female Cheumatopsyche (Little Sister Sedges) Caddisfly Adult

View 3 Pictures

Collected May 16, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Specimen Page:12

Jargon Defined:

Abdomens: The rear and usually the longest (ten-segmented in mayflies) portion of an insect's body, to which the tails are attached.

Pupae: Any insect which spends most of its juvenile lifetime as a larva first becomes a pupa for a time before emerging as a fully grown adult. Depending on the species, the pupal form can be very important for fly fishermen to imitate.

Venation: The pattern in which the veins on the wings of an insect are arranged. It is usually one of the most useful identifying characteristics.

Useful References:

LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.

Swisher, Doug and Carl Richards. 2000. Selective Trout. The Lyons Press.