Species Details

Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

SeasonalityIn Alberta adults have been collected from late June through mid August. IdentificationE. olivalis is a member of the detersa group of the subgenus Euxoa. They are medium-sized moths (3.0-3.4 cm wingspan) with brown or grey-brown forewings, longitudinally streaked with black, light grey and olive brown. The costa and cubital vein are contrasting light grey, especially near the base. The elongated orbicular spot and crescent shaped reniform are also outlined and partially filled with contrasting pale grey scales. There is a thin black basal line, and black scales outline the claviform spot and fill the cell before the orbicular and between the orbicular and reniform spots. The veins are mostly lined with black scales, and there is a series of basally pointing black arrowheads between the veins in the submarginal area. The terminal band is dark brown. There is usually a slightly paler olive or yellow-brown streak running from below the orbicular spot to the anal angle. Hindwings pale buff usually shading to smoky brown on the outer third; entirely brown in females and some males. Very similar to E. plagigera, and to a lesser extent to E. oblongistigma. The light grey or white cubital vein will separate most specimens of olivalis from these similar species. Questionable specimens may require dissecting for positive identification. Lafontaine has prepared useful keys to the detersa group (Lafontaine, 1981) and to the genus Euxoa (Lafontaine, 1987).

Scientific Name Euxoa olivalis Habitat Arid sagebrush grasslands and open montane pine forest Seasonality In Alberta adults have been collected from late June through mid August. Identification
E. olivalis is a member of the detersa group of the subgenus Euxoa. They are medium-sized moths (3.0-3.4 cm wingspan) with brown or grey-brown forewings, longitudinally streaked with black, light grey and olive brown.…
E. olivalis is a member of the detersa group of the subgenus Euxoa. They are medium-sized moths (3.0-3.4 cm wingspan) with brown or grey-brown forewings, longitudinally streaked with black, light grey and olive brown. The costa and cubital vein are contrasting light grey, especially near the base. The elongated orbicular spot and crescent shaped reniform are also outlined and partially filled with contrasting pale grey scales. There is a thin black basal line, and black scales outline the claviform spot and fill the cell before the orbicular and between the orbicular and reniform spots. The veins are mostly lined with black scales, and there is a series of basally pointing black arrowheads between the veins in the submarginal area. The terminal band is dark brown. There is usually a slightly paler olive or yellow-brown streak running from below the orbicular spot to the anal angle. Hindwings pale buff usually shading to smoky brown on the outer third; entirely brown in females and some males. Very similar to E. plagigera, and to a lesser extent to E. oblongistigma. The light grey or white cubital vein will separate most specimens of olivalis from these similar species. Questionable specimens may require dissecting for positive identification. Lafontaine has prepared useful keys to the detersa group (Lafontaine, 1981) and to the genus Euxoa (Lafontaine, 1987).
Life History There is a single brood each year, with adults flying mainly in July. They are attracted to light. Conservation A widespread species; no concerns. Diet Info No information available. Range
From southern Saskatchewan south to west to south-central BC, south to southern California, northern Arizona and New Mexico. In Alberta, it has been collected in the mountains, parklands and grasslands, from just…
From southern Saskatchewan south to west to south-central BC, south to southern California, northern Arizona and New Mexico. In Alberta, it has been collected in the mountains, parklands and grasslands, from just north of Jasper and the Red Deer area south.

Citation

Page Citation for Euxoa olivalis

Page Citation

"Species Details - Euxoa olivalis, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-2365. Accessed 21 Jul. 2024.

References

Specimen Information

There are 109 specimens of this Species.

109 results plotted on map in 28 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM17710 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Calgary Collected ByBowman, K. Date Collected1921-08-15

UASM17854 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Writing-On-Stone Provincial Park Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2000-06-28/2000-06-29

UASM17855 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Calgary Collected ByBowman, K. Date Collected1921-08-15

UASM17864 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Calgary Collected ByWolley-Dod, Frederic H. Date Collected1896-08-19

UASM17871 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Calgary Collected ByBowman, K. Date Collected1919-07-29

UASM17874 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1934-07-21

UASM34949 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Lost River Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2000-06-26/2000-06-27

UASM34950 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Lost River Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2000-06-26/2000-06-27

UASM34951 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Lost River Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2000-06-26/2000-06-27

UASM34952 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Lost River Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2000-06-26/2000-06-27

UASM58296 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Writing-On-Stone Provincial Park Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2000-06-28/2000-06-29

UASM58297 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Writing-On-Stone Provincial Park Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2000-06-28/2000-06-29

UASM58298 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Writing-On-Stone Provincial Park Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2000-06-28/2000-06-29

UASM58299 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Lost River Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2000-06-26/2000-06-27

UASM58300 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Lost River Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2000-06-26/2000-06-27

UASM58301 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, South Saskatchewan River Collected ByAnweiler, G. G. Date Collected1998-07-28

UASM57196 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Onefour Collected ByMengersen, E. Date Collected2001-06-28/2001-06-09

BIRD8639 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Dry Island Buffalo Jump Provincial Park Collected ByBird, C. D. Date Collected2004-07-18

BIRD15995 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Dry Island Buffalo Jump Provincial Park Collected ByBird, C. D. Date Collected2005-08-02

UASM58712 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Bindloss Collected ByAnweiler, G. G. Date Collected2005-06-15

UASM111325 - Euxoa olivalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Washington, Yakima county, Bethel Ridge Collected ByTroubridge, J. Date Collected1995-08-18

Adult Seasonal Distribution