Species Details

Digrammia irrorata

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

SeasonalityIn Alberta collected from the latter half of May through mid June. IdentificationA medium-size (approx 2.5 cm wingspan) broad-winged brownish-grey geometrid moth. The forewings are crossed by an incomplete antemedian and complete and prominent postmedian line, buff-yellow in color and, the latter also reappearing across the lower half of the hindwings. There is a well-developed discal spot on each forewing, and a less distinct one on the hindwings. In males in particular there is usually a series of poorly defined dark spots or blotches marking the median line and crossing the forewings distad to the postmedian line. The veins on the outer half of the forewings are finely lined by pale yellow scales. The pale yellow postmedian lines across both wings lacking a border of dark scales can be used to separate irrorata from other Alberta Digrammia species (i.e. D. mellistrigata).

Scientific Name Digrammia irrorata Seasonality In Alberta collected from the latter half of May through mid June. Identification
A medium-size (approx 2.5 cm wingspan) broad-winged brownish-grey geometrid moth. The forewings are crossed by an incomplete antemedian and complete and prominent postmedian line, buff-yellow in color and, the latter…
A medium-size (approx 2.5 cm wingspan) broad-winged brownish-grey geometrid moth. The forewings are crossed by an incomplete antemedian and complete and prominent postmedian line, buff-yellow in color and, the latter also reappearing across the lower half of the hindwings. There is a well-developed discal spot on each forewing, and a less distinct one on the hindwings. In males in particular there is usually a series of poorly defined dark spots or blotches marking the median line and crossing the forewings distad to the postmedian line. The veins on the outer half of the forewings are finely lined by pale yellow scales. The pale yellow postmedian lines across both wings lacking a border of dark scales can be used to separate irrorata from other Alberta Digrammia species (i.e. D. mellistrigata).
Life History Poorly known. Adults are nocturnal and come to light. Conservation Uncommon in Alberta, but a widespread species. No reason for concern. Diet Info Apparently unknown. Range A western species, occurring from southern Alberta west into BC, south to at least California and Arizona. In Alberta it has been collected along the eastern parts of the South Saskatchewan and Red Deer River valleys.
Digrammia irrorata
Digrammia irrorata

Taxonomic Hierarchy

Kingdom Animalia Phylum Arthropoda Class Hexapoda Subclass Insecta Order Lepidoptera Suborder Ditrysia Superfamily Geometroidea Family Geometridae Subfamily Ennominae Tribe Semiothisini Genus Digrammia Species Digrammia irrorata
This hierarchy is created from our museum records, it may not always accurately reflect modern taxonomies.

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum