Dark Blue Sedges
This common name refers to only one genus.
These are often called Dark Blue Sedges.
It pays to learn the quirks
of this very abundant and unusual genus. Its hatches stumped Gary LaFontaine for years before he learned their subtleties, prompting him to give the most common species, Psilotreta labida
, the nickname "Slap-in-the-Face Caddis."