Trichoteras coquilletti Ashm.

Quercus chrysolepis, vacciniifolia
Leaf galls, oak apples
Fig 95. Smaller oak apple, on leaf below, dia 10 mm. Mono.

Fig 95. Q. chrysolepis and vaccinifolia. Galls just starting in June (Camp Baldy), on Apr. 20 (California Redwood Park). Adults emerged Feb.9 (Mt. Wilson), Jan. 15 (Camp Baldy).

Trichoteras coquilletti

Quercus wilcoxii [chrysolepis]
Leaf galls
Detachable
Fig 79.

Trichoteras coquilletti sp. n.

Galls. — Small, brown, subopaque, globular galls, averaging from 6 to 8 mm. in diameter, and internally with a central kernel or larval cell held in place by radiating filaments. These galls were collected by Mr. D. W. Coquillett, at Los Angeles, Cal., from the upper surface of the leaves of an unknown oak, who forwarded them to the Department of Agriculture, where three specimens of the gall wasp were reared. Structurally and in general appearance the galls very closely resemble Dryophanta polita Bass., but the subapterous wasp is quite different from that species.

Range: CA

Trichoteras coquilletti Ashmead

The writer collected galls on Quercus chrysolepis at Camp Baldy, June IG, 1918, when they seemed too immature to rear but flies, agreeing with the types, emerged January 15, 1919. In September, 1922, galls were collected in the Santa Ana Mountains (a living fly cut out November 14) and at Idyllwild and adults were cut out on January 23.

Trichoteras coquilletti
(Andricus coquilletti)*
Little-oak-apple-gall wasp
[Page 154]

Hosts: Quercus vacciniifolia, chrysolepis

This cynipid wasp induces small, round, thin-skinned, monothalamous oak-apple galls on the ventral side of leaves of huckleberry and canyon live oaks.