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 Habitat In Alberta found in shrubby areas along river valleys of the arid grasslands region. 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

Citation

Page Citation for Digrammia irrorata

Page Citation

"Species Details - Digrammia irrorata, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-5315. Accessed 04 Nov. 2024.

Specimen Information

There are 8 specimens of this Species.

8 results plotted on map in 4 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM41647 - Digrammia irrorata

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Sandy Point Recreation Area Collected ByAnweiler, G. G. Date Collected2000-05-19

UASM57108 - Digrammia irrorata

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, South Saskatchewan River Collected ByAnweiler, G. G. Date Collected2004-06-02

UASM57117 - Digrammia irrorata

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, South Saskatchewan River Collected ByAnweiler, G. G. Date Collected2004-06-02

UASM57267 - Digrammia irrorata

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Pakowki Lake Collected ByAnweiler, G. G. Date Collected2004-06-23

UASM57524 - Digrammia irrorata

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Buffalo Collected ByAnweiler, G. G. Date Collected2005-06-16

UASM57534 - Digrammia irrorata

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Buffalo Collected ByAnweiler, G. G. Date Collected2005-06-16

UASM57536 - Digrammia irrorata

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Buffalo Collected ByAnweiler, G. G. Date Collected2005-06-16

UASM210976 - Digrammia irrorata

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Saskatchewan, St. Victor Collected ByGlaske, D. Date Collected2004-08-13

Adult Seasonal Distribution