IdentificationA small (1.7-1.9 cm wingspan) broad-winged yellow-brown and white moth. The forewings are pale cream with numerous wavy incomplete parallel cross lines of darker yellow-brown and light grey. Light postmedian band prominent where bending inward sharply before joining costa as large light patch. Prominent dark discal bars, Fringe checked white and light brown. Hindwings white or cream with yellow-brown marking on lower half, and with prominent dark discal bars. Adults and genitalia of both sexes are illustrated in Bolte, 1990. The light yellow-brown color and prominent discal bars on four wings will help separate niveifascia from most other western Alberta Eupithecia, although the genitalia should be examined for positive identification, in particular when specimens are worn.
A small (1.7-1.9 cm wingspan) broad-winged yellow-brown and white moth. The forewings are pale cream with numerous wavy incomplete parallel cross lines of darker yellow-brown and light grey. Light postmedian band…
A small (1.7-1.9 cm wingspan) broad-winged yellow-brown and white moth. The forewings are pale cream with numerous wavy incomplete parallel cross lines of darker yellow-brown and light grey. Light postmedian band prominent where bending inward sharply before joining costa as large light patch. Prominent dark discal bars, Fringe checked white and light brown. Hindwings white or cream with yellow-brown marking on lower half, and with prominent dark discal bars. Adults and genitalia of both sexes are illustrated in Bolte, 1990. The light yellow-brown color and prominent discal bars on four wings will help separate niveifascia from most other western Alberta Eupithecia, although the genitalia should be examined for positive identification, in particular when specimens are worn.
Life History
Poorly known. Adults are likely active both at dusk and after dark. There is probably a single brood in Alberta. In adjacent BC adults fly from late May to mid July; the Alberta specimen was collected on July 11,…
Poorly known. Adults are likely active both at dusk and after dark. There is probably a single brood in Alberta. In adjacent BC adults fly from late May to mid July; the Alberta specimen was collected on July 11, 2005. The larva and host plant are unknown.
Range
Extreme southwestern Alberta west to Vancouver Island, north to northern coastal BC and south to New Mexico. The only Alberta record is a single specimen collected in Waterton Lakes National Park. The Type Locality is…
Extreme southwestern Alberta west to Vancouver Island, north to northern coastal BC and south to New Mexico. The only Alberta record is a single specimen collected in Waterton Lakes National Park. The Type Locality is New Mexico.
Notes
This is another of the western moths that reach Alberta in the extreme southwest. It has been found only in Waterton Lakes National Park, but likely will be found more widely in the mountains south of the Crowsnest Pass.
Citation
Page Citation for Eupithecia niveifascia
Page Citation
"Species Details - Eupithecia niveifascia, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-6173. Accessed 25 Mar. 2023.