Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Photo#1757249
Lycopus miner

Lycopus miner
Lincrest, Harford County, Maryland, USA
September 8, 2019
Very narrow linear mine(s?) found on stem and leaf of water horehound. Pseudopostega?

That's my best guess
I still haven't managed to rear these to confirm.