Feron atrimentum (agamic)

Feron atrimentum (sexgen)

Andricus atrimentus (unisexual generation)

Gall:
Monothalamous, conical, flat-based, detachable, on lower leaf margin. Sides nearly straight, flaring slightly at base. Basal larval cell oval in side view, 1.6 mm in diameter, 0.8 mm high, pubescent. Upper surface of larval cell coriaceous with sparse pubescence; brown, darker towards center. Red and yellow striped. 

Host:
Quercus douglasii

Andricus atrimentus (bisexual generation)

Gall:
By mid-March the integral leal galls of the bisexual generation usually reach full size and the outer white layer develops its pink-tinted tissue paper texture. The blue-black larval cell is connected to the outer layer by numerous blue-black filaments which become white distally.

Host:
Quercus douglasii
*similar galls noted on Quercus dumosa [berberidifolia?] and Quercus turbinella californica [john-tuckeri], but not confirmed by reared insects. 

Unisexual generation of Andricus atrimentus (Hymenoptera: Cynipidae)