Species Perizoma costiguttata - Hodges#7325

7325

described in 1896 by Hulst, who originally placed it in genus Hydriomena

costiguttata: from "costa" (a rib) + "guttate" (spotted, as with drops); refers to the large dark spots along the forewing costa (the anterior marginal "rib" of an insect's wing)

wingspan about 22-27 mm, based on five Internet photos

Adult: forewing pale gray, speckled, and with darker shading beyond subterminal line; basal, AM, median, and PM lines double, dark, fine; 3 large black patches along costa represent upper end of basal, median, and PM lines; subterminal line pale, zigzag; small dark discal dot (sometimes absent) just outside median line; hindwing paler, with fewer markings but more prominent discal spot (if present); terminal line a series of paired dots on all wings

California to British Columbia, east to Arizona, Utah, and probably Colorado

adults fly from May to September in California

larvae feed on leaves of Oceanspray (Holodiscus discolor)

related species lack the large black patches along the forewing costa

Moth Photographers Group (MPG)

Barcode of Life (BOLD)

pinned adult images (Bruce Walsh, Moths of Southeastern Arizona)

pinned adult image and collection site map (All-Leps)

larval foodplant mentioned under the account of a related species (Jeff Miller, Macromoths of Northwest Forests and Woodlands, USGS)

presence in California; list of 14 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)

author, date, and original genus (nearctica.com)