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Species Details
Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum Read more about this collection »
SeasonalityAdults fly from early June to mid-September.
IdentificationMale forewings are pale grey-brown and uniformly irrorate. Antennae are brownish cream, vertex dark brown anteriorly and yellow-brown posteriorly and thorax is a rich red-brown, yellow-brown laterally. The legs are yellowish cream with yellow to cream spurs. The male aedeagus does not have black spines or hooks. There is a pair of small, dorsal membranous lobes posterad of the tip (Nimmo, 1987).
Scientific Name
Hydropsyche oslari
Habitat
Any flowing water.
Seasonality
Adults fly from early June to mid-September.
Identification
Male forewings are pale grey-brown and uniformly irrorate. Antennae are brownish cream, vertex dark brown anteriorly and yellow-brown posteriorly and thorax is a rich red-brown, yellow-brown laterally. The legs are…
Male forewings are pale grey-brown and uniformly irrorate. Antennae are brownish cream, vertex dark brown anteriorly and yellow-brown posteriorly and thorax is a rich red-brown, yellow-brown laterally. The legs are yellowish cream with yellow to cream spurs. The male aedeagus does not have black spines or hooks. There is a pair of small, dorsal membranous lobes posterad of the tip (Nimmo, 1987).
Life History
Annual(?) Unknown.
Conservation
Very common.
Diet Info
Larvae are omnivorous.
Range
This western species is found throughout the Cordillera, from Alaska south to Mexico. In Alberta, recorded from the open plains, foothills and the boreal forest.
Citation
Page Citation for Hydropsyche oslari
Page Citation
"Species Details - Hydropsyche oslari, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-1315/9-13553. Accessed 14 Mar. 2025.
References
Author
LaFontaine, Gary
Title
Caddisflies
Publication Date
1981
Pages
336
Author
Nimmo, A. P.
Title
The adult Arctopsychidae and Hydropsychidae (Trichoptera) of Canada and adjacent United States.
Publication Date
1987
Series Title
Quaestiones Entomologicae
Volume
23
Pages
1-189
Specimen Information
There are 61 specimens of this Species.
UASM5638 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Edmonton
Collected ByWoods, N.
Date Collected1965-07-01/1965-07-05
UASM5614 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Edmonton
Date Collected1963-08-06/1963-08-07
UASM5599 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Highwood River
Collected ByNimmo, A.
Date Collected1965-08-13
UASM5601 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Oldman River
Collected ByNimmo, A.
Date Collected1968-08-04
UASM5602 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Edmonton
Collected ByWhitehead, D. R.
Date Collected1964-07-23
UASM5604 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, North Saskatchewan River
Collected ByNimmo, A.
Date Collected1966-07-05
UASM5605 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Highwood River
Collected ByNimmo, A.
Date Collected1966-07-15
UASM5606 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, French Creek
Collected ByNimmo, A.
Date Collected1965-07-30
UASM5609 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Baptiste Creek
Collected ByNimmo, A.
Date Collected1965-07-20
UASM5611 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Edmonton
Collected ByStrickland, Edgar H.
Date Collected1941-08-03
UASM5613 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, North Saskatchewan River
Collected ByNimmo, A.
Date Collected1965-07-29
UASM5616 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fairview
Collected ByPhilip, H.
Date Collected1976-08-20
UASM5618 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Waterton Lakes National Park, Waterton
Collected ByNimmo, A.
Date Collected1965-08-19
UASM5623 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fort Vermilion
Collected ByPhilip, H.
Date Collected1976-08-16
UASM5624 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Oldman River
Collected ByNimmo, A.
Date Collected1976-07-31
UASM5625 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Highwood River
Collected ByNimmo, A.
Date Collected1968-08-04
UASM5627 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fairview
Collected ByPhilip, H.
Date Collected1976-07-09
UASM5628 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fairview
Collected ByPhilip, H.
Date Collected1976-08-09
UASM5632 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Girouxville
Collected ByPhilip, H.
Date Collected1976-08-01
UASM5634 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Girouxville
Collected ByPhilip, H.
Date Collected1976-08-13
UASM5635 - Hydropsyche oslari
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Fairview
Collected ByPhilip, H.
Date Collected1976-08-04