|scientific name Metanema determinata |
common name Dark-banded Thorn, Dark Metanema
Deciduous and mixedwood forests and woodlands.
Flies from mid May to mid July, most common in the latter half of June.
Wings two-toned grey with two straight, yellow-tan transverse lines on the forewing. Median area between AM and PM lines darker grey. Black forewing discal spot small or absent.
Similar to M. inatomaria, which lacks the darker contrasting band between the two transverse lines and has yellow scales within the dark discal spot (determinata has an all-black discal spot).
The mottled brown-grey and slightly flattened larva blends in well with tree bark. The pupa overwinters (Wagner et al 2001). Adults fly up when disturbed during the day, and also come to light at night.
Not of concern.
Larvae feed on willows (Salix spp.) (Prentice 1963).
Found throughout most of North America, from the Yukon, NWT and central BC east to Nova Scotia, south to MD, NE and NM (McGuffin 1987, Wagner et al. 2001).
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