On Corylus cornuta; the wider mine.
On Corylus cornuta. All photos after the first were taken on 9/28/2020.
On Lyonia ligustrina. This observation is for the linear mine at the base of the upper leaf; these leaves also have mines of undescribed species of Brachys and Parornix, and the leaftier is an as yet undetermined gelechiid moth (Litini).
On Populus grandidentata. External larva photographed on 9/27/2020.
On Carya tomentosa. The second to last photo shows an occupied mine, and the last photo shows the same mine four days later.