Here are a couple pictures to aid in the identification of leaf miners as a culprit in the garden. The spinach leaf on the left shows the underside with damage and tiny white cluster of eggs. The photo on the right shows the top side mosaic of the leaf miner worms track as he ate his way out. This spinach patch is now covered with floating row cover, the lightweight fabric designed as an insect barrier. I am Neeming weekly on baby stuff and leafy greens to prevent a multitude of bugs that will arrive soon.