Callirhytis balanaspis, new species

Host. — Quercus marilandica Muenchhausen.

Gall. — Produced in the fall in October on immature acorns which are about 6 mm. in diameter, the size being characteristically larger than the normal young acorns. It is deeply embedded in the acorn cup beside the acorn, less than half of the gall protruding, and secretes honeydew at apex while growing. When detached the gall is 5 by 7 mm., flattened, tapering at each end. The larval cell is in the middle and placed transversely.

Habitat. — The type material was collected at Texarkana, Arkansas, October 15, 1917. A pupa was cut out March 25, 1919 (trans- formed by April 29), and two living flies were cut out December 2, 1919. Normal emergence date unknown. The same galls were noted at Ironton, Missouri; Little Rock and Hot Springs, Arkansas; and at Palestine, Texas. Large numbers were seen at Eosslyn, Virginia, and in the District of Columbia on October 10, 1920, when the galls were dropping to the ground and being gnawed open, probably by mice.

- LH Weld: (1922) Notes on American Gallflies of the Family Cynipidae Producing Galls on Acorns: With Descriptions of New Species^©

Reference: https://www.biodiversitylibrary.org/page/7305399#page/496/mode/1up