Andricus vernus, new species

Host. — Quercus garryana.

Gall (pl. 1, fig. 2). — A smooth, globular, green axillary bud gall, 4-5 mm. in diameter, with a very slight nipple at apex early in spring as new leaves are developing. When detached showing a small whitish sunken scar. After dropping the thin outer fleshy layer becomes wrinkled and soon weathers away, leaving a smooth, slightly elongated, light tan cell whose wall is 0.6-0.7 mm. thick, not brittle, containing about 15 small longitudinal passages.

Habitat . — Galls were collected on May 23, 1922, at Fort Jones, Calif., and sent to Washington under Hopkins U. S. No. 15640. The nutritive layer was then used up and the larvae full grown. Adults emerged on April 27, 1923, April 21, 1924, and April 3, 1925. These galls were seen on this host at Yreka and Scott Bar, Calif., and at Siskiyou, Oreg. Similar galls were seen on Quercus dumosa at Lakeport, Bartlett Springs, and Ukiah, Calif.

Andricus verensis Weld.

133. verensis Weld. N. name for vernus Weld 1944 US Natl Mus., Proc 95:13. Female O Preocc. Ft Jones, CA. Q garryana. Adults emerged Apr 27, 1923, Apr 21, 1924 and Apr 3 1925 from galls collected in May 1922.

Quercus dumosa, garryana
Stem galls, bud galls
Fig 196. Globular, green, 4-5 mm, wall thick.

Fig 196. A smooth green bud gall with only a slight nipple at apex and a sunken white scar at base when detached. Q. dumosa and Q garryana. After it drops the fleshy green layer on outside dries up and a cross-section of the thick hard inner wall shows about a dozen longitudinal passages.