SeasonalityAdults fly from late July to early October.IdentificationAdult antennae are uniform yellowish brown and the spurs are hyaline to yellow. Forewings are grayish brown with hyaline areas. In males, the posterior edge of tergum 8 with a distinct bulge clothed in black, stout setae. The mesal face of the cercus and the ventral portion of the distal edge have a row of black teeth. Clasper tip is upturned as a black spine (Nimmo, 1971).
Scientific NameLimnephilus externusHabitat
Smaller Carexponds and sloughs.
Seasonality
Adults fly from late July to early October.
Identification
Adult antennae are uniform yellowish brown and the spurs are hyaline to yellow. Forewings are grayish brown with hyaline areas. In males, the posterior edge of tergum 8 with a distinct bulge clothed in black, stout…
Adult antennae are uniform yellowish brown and the spurs are hyaline to yellow. Forewings are grayish brown with hyaline areas. In males, the posterior edge of tergum 8 with a distinct bulge clothed in black, stout setae. The mesal face of the cercus and the ventral portion of the distal edge have a row of black teeth. Clasper tip is upturned as a black spine (Nimmo, 1971).
Life History
Annual?
Conservation
Very common.
Diet Info
Larvae are detritovores.
Range
This species is Holarctic in distribution, extending from Great Slave Lake, south California, east to Nova Scotia and Newfoundland. In Alberta, this species occurs in the mountains and plains (Nimmo, 1971).
Citation
Page Citation for Limnephilus externus
Page Citation
"Species Details - Limnephilus externus, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-3086. Accessed 25 Mar. 2023.