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.
In 4 records from GBIF, adults of this species have been collected during May (50%), March (25%), and June (25%).
Most physical descriptions on Troutnut are direct or slightly edited quotes from the original scientific sources describing or updating the species, although there may be errors in copying them to this website. Such descriptions aren't always definitive, because species often turn out to be more variable than the original describers observed. In some cases, only a single specimen was described! However, they are useful starting points.
Abdominal tergites of male imago pale reddish brown; venation yellowish on costal margin, otherwise pale.
Head ferruginous; antenna similar in color, the filament generally pale. Thorax ferruginous; sternum "paler behind, especially the space between the posterior coxae" (Walsh). Legs pale greenish yellow; in the fore leg, the apex of the femur, tips and joinings of the tarsi, are slightly fuscous. Middle and hind legs paler, only the tips of tarsi cloudy. Wings hyaline; longitudinal veins of the costal margin yellowish, radius piceous at the extreme base, "a few of the principal veins slightly tinged with fuscous” (Walsh); all other veins pale. Cross veins almost invisible. Abdominal tergites pale reddish brown, the posterior margins whitish; sternites somewhat paler. Tails whitish, the joinings fuscous, especially in the basal portion. Forceps pale, sometimes reddish toward the tip. Genitalia as in fig. 148.