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 36 records from GBIF, adults of this species have mostly been collected during June (36%), July (33%), August (19%), and May (6%).
In 78 records from GBIF, this species has been collected at elevations ranging from 502 to 11001 ft, with an average (median) of 4905 ft.
Current speed: Slow to moderate
Substrate: Fine gravel, maybe sand or silt
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.
A yellowish species; reddish brown dorsal stripe on mesonotum, black markings on pleura above coxae; genitalia as in fig. 94.
Head pale yellowish; a reddish spot on frontal carina, and red shading on vertex between eyes and ocelli. Thoracic notum pale yellowish; a median reddish brown stripe on mesonotum, and pinkish area anterior to scutellum. Pleura and sternum likewise yellowish; pinkish areas on pleura below base of each wing; a black streak above base of middle and hind coxae, and a black spot posterior to hind coxae. Fore leg light bronzy brown; femur indistinctly banded at middle with light reddish brown, red-brown also at apex; apex of tibia, distal tarsal joint and tarsal joinings, also claws, dull reddish to blackish brown. Middle and hind legs yellowish amber; no median femoral band; tip of tibia not darkened. Basal joint of fore tarsus about 1/6 the length of the second joint. Wings hyaline. Costal margin of fore wing may be tinged with pale lemon yellow, with greenish or bistre-grey. Subcosta and radius yellowish amber in basal half; other longitudinal veins fine, pitch brown to black. Humeral cross veins thickened posteriorly, blackish. Cross veins dark; those in costal space thicker than others, black; a well-marked black bulla.
Abdominal segments pale; 2-7 semi-hyaline, 8-10 opaque. Posterior margins of tergites 2-7 smoky greyish or brownish; tergites 8-10 tinged with pink. Sternites pale yellowish. Tails pale yellowish, joinings dark brown. Genitalia distinctive.