Lasionycta quadrilunata is a species of moth in the family Noctuidae. It is found from south-central Alaska down the spine of the Rocky Mountains to Colorado.
It flies over scree tundra and is diurnal.
Adults are on wing from mid-July to early August.
Subspecies Lasionycta quadrilunata quadrilunata (mountains of Colorado) Lasionycta quadrilunata yukona (Alaska Range, southwestern Yukon, the Alberta Rocky Mountains, and the Beartooth Plateau in Montana)
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