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Species Digrammia californiaria - Californian Granite - Hodges#6380

light grey moth with black spots - Digrammia californiaria Californian Granite? - Digrammia californiaria Digrammia denticulata ? - Digrammia californiaria Macaria? - Digrammia californiaria California Granite Moth - Digrammia californiaria
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 Geometroidea (Geometrid and Swallowtail Moths)
Family Geometridae (Geometrid Moths)
Subfamily Ennominae
Tribe Macariini
Genus Digrammia
Species californiaria (Californian Granite - Hodges#6380)
Hodges Number
6380
Synonyms and other taxonomic changes
Semiothisa californiaria
described in 1871 by Packard, who originally placed it in genus Macaria
Size
wingspan 22-29 mm, based on six Internet photos
Identification
Adult: forewing whitish to pale brown with sparse dark speckling; small black patches along costa represent upper ends of AM, median, and PM lines, which are otherwise missing or faint; broken dark patch about one-third distance from costa along PM line; some individual have slightly darker shading beyond PM line; hindwing color similar to forewing but with small discal spot as its only marking
Range
Texas to California, north to Alberta and British Columbia
Habitat
prairie badlands (in Alberta); adults are nocturnal and come to light
Season
adults fly from March to October in California (2 broods); possibly all year in Texas
Food
larvae feed on Big Deervetch (Lotus crassifolius) on the west coast, and presumably other legumes in the interior where Big Deervetch does not occur
Life Cycle
two generations per year in Alberta; perhaps more in the south
See Also
Digrammia parcata forewing has smaller and fainter markings, and broken dark patch about one-half distance from costa along PM line (see photo from Arizona by Bruce Walsh)
Internet References
pinned adult image by G.G. Anweiler, plus common name reference, habitat, flight season, description, larval foodplant, biology, distribution (Strickland Entomological Museum, U. of Alberta)
21 pinned adult images plus collection site map (All-Leps)
pinned adult images plus date and location (Bruce Walsh, Moths of Southeastern Arizona)
pinned adult images and photos of related species by Bob Belmont (Moth Photographers Group)
presence in California; list of 40 specimen records with dates and locations (U. of California at Berkeley)
presence in Texas; list (James Gillaspy, U. of Texas)
distribution in Canada list of provinces (CBIF)