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Species Page - Coranarta macrostigma
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scientific name    Coranarta macrostigma    

Dry montane meadows and slopes, including alpine areas; old dunefields.

In Alberta, from late May through late July, with later dates at higher elevations and latitudes.

A small (2.3-2.6 cm wingspan) day-flying moth with black forewings and yellow hindwings. Head, thorax and abdomen black with a few grey scales. The forewings are grey and black. Basal and subterminal areas are grey, with an overlay of scattered black scales, darker in the basal area. The median area is black with a few grey scales. Reniform spot is large, incompletely outlined with white scales and mostly filled with grey. The fringe is black with a few white scales at the veins. Hindwings are yellow with a broad black terminal band. The hindwing fringe is white, lightly checkered with dark scales at the veins, mainly on the upper half. Sexes are alike, with filiform antennae in both. The closely related C. luteola has much less grey filling in the white reniform spot and lacks the checkering on the hindwing fringe. There are also genitalic differences. See also Lasionycta leucocycla and L. secedens. Until recently placed in the genus Anarta.

life history
Adults are diurnal, and may be found nectaring at flowers in bright sunshine. There is a single brood each year. They have a fast, buzzing flight and resemble bees more than moths. The immature stages are unknown.

Widespread, but local and rarely encountered; dune populations need monitoring.

diet info
No data. Related species utilize bearberry (Arctostaphylos) and other Ericaceae as larval hostplants, and bearberry is the suspected host for macrostigma in Alberta. Adults have been collected while nectaring at bearberry blossoms (pers. obs., G. Anweiler)

Alaska, Yukon, western Northwest Territories south through BC and Alberta to Colorado. In Alberta found in the foothills and mountains, and north of Lake Athabasca.

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Specimen Info
There are 19 specimens of this species in the online database
Map Distribution
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Specimen List (19)
Related Links
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