Compsodryoxenus pattersoni, new species

Gall.--A slight but distinct swelling of small roots. Polythalamous. Galls gradual enlargements from the stems, elongate, averaging 20 mm long by 4 mm wide, often larger, covered with natural or slightly roughened bark. Internally woody, but the tissue irregular, with the larval cells closely clustered, the lining not separable nor hardly distinct, each cell spherical, about 1 mm in diameter. On roots of Quercus virginiana.

Range.--TX

One of the galls is constricted into two parts, the parts bent at an angle; the other galls are straight, undivided; the two types of galls give the same kinds of adults. These galls contained live adults in December; insects emerged on February 9. It is not impossible that adults are mature in the galls over the winter, not emerging until early in the following spring. Similar but much smaller swellings at the bases of petioles had adults emerge on Dec. 27 which appear exactly identical with those from the root galls. Some sort of alternation of generations may be involved here, but it is not unlikely that the species will produce galls on various parts of the plant, not being confined to the roots only.

- Alfred Charles Kinsey: (1922) Studies of some new and described Cynipidae (Hymenoptera)^©

Reference: https://www.biodiversitylibrary.org/page/45387508#page/111/mode/1up