|scientific name Digrammia decorata |
common name Decorated Granite
Alberta records are for late May and August, possibly indicating two broods.
Forewing uniform gray with a bold black AM and PM line and discal spot. Subterminal area shaded dark. Hindwing with faint discal spot and PM line. Very similar to the dark form of M. hebetata, but hebetata lacks the contrasting dark submarginal band distal to the PM line. Decorata also usually has a thin white area bordering the outer margin of the PM line of the hindwing, absent in hebetata.
The mature larva is green with paler lines and a yellow lateral stripe (McGuffin 1972). No other life history information is available.
No obvious concern.
Larvae feed on willows (Salix spp.) (McGuffin 1972).
Manitoba to BC, south to Utah (McGuffin 1972).
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