Other Common Names
Maple eyespot gall & Maple Leaf Spot Gall.
Synonyms and other taxonomic changes
Larvae develop in leaves of maples, usually Acer rubrum and usually in the spring. After a week in the leaf (during which time the gall is formed) the larva drops to the ground, burrows, and pupates. Adults emerge the following spring.
These fungal leaf spots, possibly caused by Septoria aceris, are somewhat similar--see the discussion below the image: