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 brown species; cross veins of fore wing rather numerous; marginal intercalaries occur singly; male not known.
Body of female brown. Two narrow white stripes on the thoracic notum. Legs pale, tips of tibiae dark, also the tarsal joints. Wings hyaline; veins and cross veins mostly white, but the longitudinal veins with some dark marks. Costal vitta consists of a “fairly broad brown stripe from base to tip, its hind margin sinuate with four projections, four hyaline spots in the subcostal area before the middle, about five pale spots on costal margin before the middle, and several more or less connected beyond.” Along the hind margin are five or six faint irregular clouds. Hind wing much as in Callibaetis floridanus. Abdomen brown, with darker spots on the sides.