Cynips quercus notha, n. sp.

Still more remarkable, perhaps, than the preceding observation, is the discovery, among large numbers of the gall of C. q. palustris, of another gall, constructed on the same principle, that is, with a moveable ovule on the inside, but entirely different in the details of its organization. This gall, growing on the same trees and in exactly the same situation with that of C q. palustris, often alongside with it, is, however, much more rare. Its shell is not globular but oblong, much thinner and hence less succulent than that of C. q. palustris. Its green surface shows some longitudinal, semitransparent veins, of which there is no trace in the other gall. The ovule likewise is different; instead of round it is elongated, rounded at one end, pointed at the other, resembling a seed very much; its outer shell is much harder, smooth and shining. One of these galls had coalesced with a gall of C. q. palustris, just in the same manner as the above mentioned double galls of the latter kind. And, singular enough, the ovule of this double gall showed, by its unsymmetrical shape, that it was the compound of the ovules of the two different kinds. (I have preserved the specimen in my collection.) I obtained several specimens, male and female, from these galls, which showed no perceptible difference from C. q. palustris. What the different shape of the gall means, is a mystery to me. Until this is solved, I propose to call the gall Quercus notha, in order to distinguish it from the other. It may be that the flies themselves, upon , closer examination, would show some specific differences. Both galls excluded their flies between the 20th and the 30th of May.

- Baron Osten Sacken: (1870) Contributions to the Natural History of the CYNIPIDAE of the United States and of their Galls. Article 5th. ^©

Reference: https://www.biodiversitylibrary.org/item/32422#page/65/mode/1up