Synonyms and other taxonomic changes
Egira hiemalis (Grote, 1874)
Xylomiges hiemalis Grote, 1874
Phylogenetic sequence #
Adult: forewing mottled light gray, darker gray, and reddish-brown; black basal dash curves toward costa, enclosing pale basal patch; reniform spot with reddish filling; orbicular spot pale, oblique, oblong; subterminal area lighter than median area; irregular subterminal line with darker shading beyond it; female darker than male, with less contrast on forewing; hindwing pale gray with dark veins, discal spot, and sometimes dark median line
Larva: body pale grayish-green to green with pairs of black dorsolateral and lateral blotches on each segment; thin white dorsal, subdorsal, and subspiracular lines; head dark reddish-brown with black band over vertex of each lobe
British Columbia to California, east to Arizona and Utah. (2)
Wet coniferous forests in the Pacific west.
Adults fly from December to March in California; April and May in British Columbia
larvae present June to August; pupation occurs in August
The larval host plants include.
Pseudotsuga menziesii (Douglas fir).
Corylus cornuta (beaked hazelnut).
Fraxinus spp. (ash).
One generation per year; overwinters as a pupa beneath leaf litter.
forewing is darker, less mottled, lacks a curved black basal dash, and has darker subterminal area (compare images
of both species at CBIF)
Natural Resources Canada
- fact sheet with photos.
pinned adult image
plus description, habitat, flight season, foodplants (Jeff Miller, Macromoths of Northwest Forests and Woodlands, USGS)
pinned adult images
(Bruce Walsh, Moths of Southeastern Arizona)
27 specimen records from California
including locations and dates (U. of California at Berkeley)
distribution in Canada
BC only (U. of Alberta, using CBIF data)