Asphondylia sp. (Diptera: Cecidomyiidae)
Vein Gall Midge
Angelo Coast Range Reserve, Mendocino County, California
June 16, 2012

Leaf gall on ceanothus (Ceanothus sp.), caused by a midge. A few orange larvae are partially visible through the slit in the gall. Slits in these galls are normal on the dorsal sides of the leaves.