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

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 Digrammia irrorata - Hodges#6395

Digrammia irrorata Moth # 07-313 - Digrammia irrorata Tan Geometer - Digrammia irrorata Euchlaena? - Digrammia irrorata Moth - Digrammia irrorata Moth - Digrammia irrorata Digrammia irrorata Geometridae moth sp? - Digrammia irrorata
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 irrorata (Digrammia irrorata - Hodges#6395)
Hodges Number
6395
Synonyms and other taxonomic changes
Digrammia irrorata (Packard, 1876)
Phasiane irrorata Packard, 1876
Semiothisa irrorata var. venosata McDunnough, 1939
Phylogenetic sequence # 189775
Size
Wingspan 23-26 mm.
Identification
Adult: forewing color varies from light tan to yellowish to medium brown with straight, pale yellowish AM and PM lines; AM line stops just short of costa, and both lines may be indistinct in paler individuals; discal spot dark brown, conspicuous; veins in outer half of wing finely lined with pale yellow scales; males in particular usually have a series of poorly-defined dark spots or blotches in median area and across wing beyond PM line. Hindwing similarly colored but with no AM line, and smaller, less distinct discal spot (adapted from description at U. of Alberta).
Range
Western United States and southwestern Canada. (1), (2)
Habitat
Shrubby areas along river valleys, arid grasslands; adults are nocturnal and attracted to light (E.H. Strickland Museum).
Season
Adults fly from March to June in northern regions. Several broods in the south.
See Also
Digrammia neptaria, the yellow PM line is usually lined with reddish-brown inner border and a blackish outer border. (3)
Print References
Ferguson, D. C. 2008. Moths of America North of Mexico. Fascicle 17.2, p.315, pl.8.8-12 (3)
Packard, A. S. 1876. Monograph of the geometrid moths or Phalaenidae of the United States. USGS Surv. Territ. 10: 273, pl. 10, f. 7
Internet References
distribution in Canada showing BC only, but also occurs in Alberta (CBIF)
pinned adult images of three specimens showing range of color and pattern (CBIF)