Neuroterus evolutus

Quercus douglasii, lobata
Stem galls, woody stem swellings or cells under the bark
Exit hole in leaf scar. Adults emerge in Jan.

Neuroterus evolutus, new species

Host. — Quercus lobata.

Gall. — A cell about 1.8 mm. long lying in the wood under a leaf or flower scar, the upper end nearly reaching but not showing at the surface until the adult begins to make the exit hole. But one or rarely two under a scar. Exit hole in the scar or near it. Found about the terminal cluster of buds or sometimes at the internodes forming the annual ring. Similar to the gall of the eastern species described above but the adult is different.

Habitat— Cottonwood, Shasta County, Calif. Twigs collected by A. W. Gambs on December 7 gave adults indoors January 6 and from others collected late in January adults emerged February 9 and 11. The normal emergence is probably before the buds start in the spring.