Andricus spectabilis Kinsey

Hosts: Quercus chrysolepis

GALL. — Elongate stem swelling. Polythalamous. Large, elongate, oval to spindle-shaped, averaging 25. mm. wide by 50. mm. long; large specimens scarcely greater in diameter will reach 110. mm. in length; covered with bark of natural color. Internally hard and woody, only the peripheral tissue being less compact than the normal stem wood; larval cells toward the center of the gall, oval, 3. by 5. mm., tissue almost not at all distinct from the rest of the wood; exit holes upon aging show a distinct, smoother area on the bark. On smaller stems of Quercus chrysolepis.

RANGE. — California: San Jacinto Mountains to Auburn and Ukiah. Probably wherever Quercus chrysolepis occurs.

[Kinsey goes on to describe several varieties that do not differ by host or gall morphology, only range and adult morphology; see paper for details]

- Alfred Charles Kinsey: (1922) Studies of some new and described Cynipidae (Hymenoptera)^©

Reference: https://www.biodiversitylibrary.org/page/45387508#page/105/mode/1up