Globally vulnerable, this species is known in Vermont only from exuvia at three sites on the Connecticut River, two of which technically may not be in Vermont: two bridges over the Connecticut River from Windham County. The third record is from Windsor County. Dates for all of these records are presently unavailable, however an adult was reported from the Connecticut River in New Hampshire, just north of Massachusetts, on July 4, 1939 (Kormandy 1960). Apparently sensitive to habitat and water quality degradation, this species appears to be in decline elsewhere within its range. It warrants further investigation in Vermont.
State: S1, Species of Greatest Conservation Need
Unknown in Vermont