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Rhopalomyia californica
2222_2232 Photo added 2011-03-20

Rhopalomyia californica (Diptera: Cecidomyiidae)
Coyote Brush Bud Gall Midge
Knowland Park, Oakland, Alameda County, California
April 15, 2008

Polythalamous gall on Baccharis pilularis (coyote brush). Exit holes and fly exuviae visible.

all photos and text © Joyce Gross