Brown bronzy forewing with clearly difines triangular spot before the tornus.
Leaf-mine: June - Sept.
Forms hair-like mine from midrib of leaf, then cuts an oval case from a short broad gallery before descending to the ground to pupate.
|Determination by Genitalia Examination (gen. det.) Required|
Recorded in 34 (49%) of 69 10k Squares.
First Recorded in 1874.
Last Recorded in 2020.