Andricus chrysolepidis

Cynipidae

Heteroecus

Quercus chrysolepis

Arizona

California

Nevada

New Mexico

Oregon

Heteroecus chrysolepidis (agamic)

Andricus chrysolepidis

Ovate or globular, nippled, presumably twig gall containing a larval cell and covered with a dense, fine, short, pubescence, diameter 5 to 8 mm, on Q chrysolepis.

Key to American Insect Galls

Heteroecus chrysolepidis (Ashmead)

Andricus chrysolepidis

Hosts: Quercus chrysolepis

Gall: A small, irregularly globular or ovate bud gall. Monothalamous. A slight nipple at the apex; the surface covered with a fine, scurfy pubescence, light brown in color; 7 mm in diameter by 10 mm long.

Range: CA

The insect is very close to [dasydactyli](https://www.gallformers.org/gall/1903). The gall is the most distinctive thing of the species. Galls from Diablo appear to match the type galls, but I do not have insects to check the determination. Unlike the type galls, some of the Diablo specimens are clustered, suggesting [H. malus](https://www.gallformers.org/gall/1731), and inasmuch as the insects of the two are rather similar perhaps malus should be considered a variety of chrysolepidis. 

Studies of some new and described Cynipidae (Hymenoptera)

Heteroecus chrysolepidis

Quercus chrysolepis 
Stem galls, detachable
"Hard, ovate or globular, with a nipple, larval cell central; covered with a dense, fine, short pubescence as on a peach altho this is sometimes rubbed off." Diameter 5-8 mm.

Cynipid Galls of the Pacific Slope