Hydropsychids exemplify what is so fascinating and rewarding about fly fishing; How greatly a given insect's life cycle influences not only when, where, and how we fish, but how we construct our flies and how we fish each.
The ties below were fashioned from almost entirely "found" materials -not from a fly shop but plucked from nature, the laboratory, even the trash.
Hydropsychid larvae turn up in lots of stomach samples I've taken but, so far, never in any numbers -just one here and there. This suggests to me that, although abundant, they are not terribly available to trout much of the time. I've yet to try LaFontaine's "white rappelling line", but have seen these larvae rappelling in my stream tank (disturbed by another larger Hydropsychid) and on stream at night with a flashlight.
Since I just haven’t seen it, I omit the “gas bubble” in my pupal ties:
Some Hydropsychid pupae drift a ways at the surface so I’ve tied in-the-film emergers too.
Since adult Hyropsychids are such good fliers upon emergence, and divers attract such attention during egg-laying, I don’t usually tie dry adults. But some Cheumatopsyche can float a ways upon emergence, so I tie some of them.
Divers have been just plain killers for me.