Cynips quercus ilicifoliae n. sp.
Quercus ilicifolia. Elongated, fusiform galls growing on the upper side of the leaves of Q. ilicifolia, and standing erect, or nearly so — sometimes entirely preventing the development of the leaf, and apparently growing out of the petiole. The central nucleus containing the larvae, is kept in place by radiating woody fibres as in C. q. inanis 0. S. The largest galls are two inches in length and seven-eighths of an inch in diameter ; average size about one and three-fourths inches long, and three-fourths in diameter. Apex rather longer and more slender than the basal portion, and often considerably curved.
These galls are of the same dark green as the leaves. Many are found very much smaller than those described above, but they produce parasitic flies. Baron Osten Sacken writes me that he met with numbers of these galls in Pennsylvania several years ago. They are rather rare here (Conn.)
”- HF Bassett: (1864) Descriptions of several new species of Cynips and a new species of Diastrophus©
Reference: https://www.biodiversitylibrary.org/item/23810#page/702/mode/1up