Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Discussion, insects and people from the 2018 BugGuide Gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

TaxonomyBrowse
Info
ImagesLinksBooksData

Species Euthyatira semicircularis - Hodges#6241

Euthyatira semicircularis Euthyatira semicircularis Euthyatira semicircularis Euthyatira semicircularis prominent moth? - Euthyatira semicircularis Euthyatira semicircularis Euthyatira semicircularis
Show images of: caterpillars · adults · both
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Drepanoidea (Hooktip and False Owlet Moths)
Family Drepanidae (Hooktip and False Owlet Moths)
Subfamily Thyatirinae (False Owlet Moths)
Tribe Macrothyatirini
Genus Euthyatira
Species semicircularis (Euthyatira semicircularis - Hodges#6241)
Hodges Number
6241
Synonyms and other taxonomic changes
described in 1881 by Grote, who originally placed it in genus Bombycia
Numbers
one of 3 species in this genus in North America listed at All-Leps
Size
wingspan about 39-45 mm, based on three Internet photos
Identification
Adult: forewing silvery gray in male, dark gray in female; 3 or 4 arc-shaped black lines cross wing in basal area, but are often faint or indistinct; semicircular whitish or pale yellow patch at base, bordered by black; pale gray apical patch bordered by black oblique apical dash; PM line dark, double, irregular, scalloped; subterminal line faint, scalloped, terminates at apical dash; hindwing light yellowish-gray with dark veins prominent in center of wing
Range
California to British Columbia, east to Utah
Habitat
wet western coniferous forests
Season
adults fly mainly from May to July in California
Food
unknown
Internet References
pinned adult image taken from this page (CBIF)
pinned adult image and photos of related species by Jim Vargo (Moth Photographers Group)
species account [containing the wrong photo -- of Ceranemota tearlei -- as of February 2008, instead of the correct photo] plus description, habitat, flight season (Jeff Miller, Macromoths of Northwest Forests and Woodlands, USGS)
pinned adult images of male and female by Paul Opler, plus US distribution map (butterfliesandmoths.org)
presence in California; list of 15 specimen records with dates and locations (U. of California at Berkeley)
presence in Utah; list (Joel Johnson, Utah Lepidopterists Society)
distribution in Canada British Columbia only (CBIF)