Callirhytis trimaculosa new species

Gall.--Small, reddish-brown, subglobular, covered densely with crystalline spicules, found singly or in clusters of two on the undersides of leaves. Monothalamous. Diameter, 2-5 mm.

Host.--Quercus lobata Nee.

Type locality.--Stanford campus, Santa Slara County, CA

Galls collected in December. Adults emerged in early summer.

Sphaeroteras trimaculosum

Quercus douglasii, dumosa, garryana, lobata
Leaf galls, detachable
Fig 147. Red-brown, spiny, under.

Fig 147. On Q-lobata. Occurs on dumosa, douglasii and garryana also. Reddish-brown, on under side, in late fall, covered with crystalline spicules. "Adults emerged in late summer" (Stanford)

Sphaeroteras trimaculosum
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This cynipid wasp induces round-ovoid, monothalamous, solid, bristly galls on the ventral midrib and lateral veins of valley, scrub, blue, and Oregon oak leaves.

Hosts:
Quercus lobata
Quercus berberidifolia
Quercus douglasii
Quercus garryana

Atrusca trimaculosa (McCracken and Egbert), comb. nov

five species from the Sphaeroteras genus herein are transferred into Atrusca