Appearance
The wingspan is 7–9 mm. The forewings are pale whitish brown to dark brown with a white longitudinal streak from the base to about half the wing length. The hindwings are pale brownish grey. Adults have been recorded on wing from April to October.Naming
The species name is derived from Latin ''angustata'' .Food
The larvae feed on ''Aster'', ''Solidago'' and rarely ''Erigeron'' species. They mine the leaves of their host plant. The mine starts as a long, linear, gradually widening track. The larva leaves this mine, to form a second mine which is trumpet-shaped. Pupation takes place in a white cocoon.References:
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