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Species Page - Euxoa lewisi
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scientific name    Euxoa lewisi    

common name     Oregon Dart

Higher elevation montane and subalpine coniferous forest.

In Alberta adults have been collected in late July and August.

A medium-sized moth (FW length 14-19 mm) with grey-brown to red-brown forewings and smoky brown hindwings. The normal lines are obsolete, but there may be a dark diffuse median line in some specimens. The oval orbicular spot is almost as large as the reniform. The spots often have an incomplete buff line inside the outline. The area between the orbicular and the reniform is darker black or red-brown, and is the most prominent mark on the forewings. The male genitalia are characterized by the broad, almost bowl-shaped sacculus, saccular extensions almost conical and stouter than harpes and about 1/2 the length of the harpes. In similarly marked species the sacculus is narrower and crescentic and the saccular extensions are as thin as or thinner than the harpes.

life history
Poorly known. The adults are nocturnal and come to light, and there is a single annual brood.

No obvious concerns

diet info

Another Euxoa species found in the western mountain coniferous forest. E. lewisi ranges from western Alberta across much of BC, south to the Cascades of eastern OR, central CO and UT. Ssp. juliae occurs in California. In Alberta, it has been taken in the mountains from Jasper National Park south to Calgary.

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Specimen Info
There are 46 specimens of this species in the online database
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Specimen List (46)
Related Links
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