Trichoteras frondeum Weld.

Quercus chrysolepis
Stem galls, detachable
Fig 150. Single, hidden in dead bud scales.

Fig 150. Q, chrysolepis. Single cell in mass of dead bud scales, ovoid, tuft of straight white hairs at apex. From galls collected at Idyllwild Nov. 6, 1948 adults were cut out Jan. 5, 1949.

Trichoteras frondeum

Quercus wilcoxii [chrysolepis]
Bud galls
Single cell inside an enlarged and apparently dead bud.

Trichoteras frondeum, new species

Host.--Quercus chrysolepis

Gall (pl. 1, fig. 6). — A transformed lateral bud, the outer brown bud scales surrounding a mass of thinner, narrower bracts. At the base in the center is a single, ovoid, thin-walled cell, 3.0 by 1.7 mm. at whose base and apex is a circle and tuft of straight, single-celled, slender white hairs 1.5 mm. long.

Habitat. — The types (dead) were cut out of galls collected at Idyllwild, Calif., on September 21, 1922. The characteristic galls have been seen on Mount Wilson, in the San Bernardino Mountains, in Sequoia National Park, at Kyburz, Los Gatos, and Shasta in California, and at Canyonville, Oreg. A similar gall on Quercus wilcoxii was noted in the Santa Catalina, Chiricahua, and Huachuca Mountains in Arizona.

Trichoteras frondeum
(Andricus frondeum)*
Leafy-bud-gall wasp

Hosts: Quercus chrysolepis

The cylindrical, monothalamous bud galls of this wasp are covered with thin, narrow bracts and occur only on canyon live oak.