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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Dorsal view of a Amphizoa (Amphizoidae) Beetle Larva from Sears Creek in Washington
This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Male Dolophilodes distincta (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Adult Pictures

This caddis species was dancing high over the stream, spaced a foot or two apart across most of its width, very much like Ephemera mayfly spinners but with more side-to-side motion mixed in. There were more than enough to get the trout interested, but I wasn't able to stick around until they fell on the water (if they did at all).

Ruler view of a Male Dolophilodes distincta (Philopotamidae) (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Adult from Mystery Creek #42 in Pennsylvania The smallest ruler marks are 1 mm.
Ventral view of a Male Dolophilodes distincta (Philopotamidae) (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Adult from Mystery Creek #42 in Pennsylvania
Male Dolophilodes distincta (Philopotamidae) (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Adult from Mystery Creek #42 in Pennsylvania
Dorsal view of a Male Dolophilodes distincta (Philopotamidae) (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Adult from Mystery Creek #42 in Pennsylvania
Lateral view of a Male Dolophilodes distincta (Philopotamidae) (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Adult from Mystery Creek #42 in Pennsylvania
Male Dolophilodes distincta (Philopotamidae) (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Adult from Mystery Creek #42 in Pennsylvania

This caddisfly was collected from Mystery Creek #42 in Pennsylvania on May 28th, 2007 and added to Troutnut.com by Troutnut on June 4th, 2007.

Discussions of this Adult

Dolophilodes (Philopotamidae)
1 replies
Posted by Litobrancha on Jun 12, 2007
Last reply on Jun 12, 2007 by Troutnut
This is a male dolophilodes, probably distinctus.

You can distinguish philopotamids from hydropsychids by the ocellar head warts that are absent in hydropsychids.

D. distinctus is everywhere, along with Oecetis inconspicua, including perhaps the moon, inner four planets and in orbit. it is a beautiful insect however.

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References

Male Dolophilodes distincta (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Adult Pictures

Collection details
Location: Mystery Creek #42, Pennsylvania
Date: May 28th, 2007
Added to site: June 4th, 2007
Author: Troutnut
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