The forewings are golden bronze, heavily mottled with minute specks of darker scales.

The hindwings are paler, grayish with a slight purplish luster, sparsely covered with moderately broad scales.

The mine starts as a narrow, linear passage extending toward the leaf margin.

Immediately following the serpentine stage, the mine broadens to form a large, somewhat inflated blotch.

Here, they create a relatively tough oval cocoon of silk and small particles of soil.