Callirhytis florensis

Quercus marilandica
Flower galls
Galls scattered among the stamens in a shortened catkin, conical, 2.2 mm long. Type host.

[Photo caption]
Q marilandica. An enlarged filament. Adults of both sexes emerged May 18-25 (DC). Next fall nearly every acorn on this tree had a gall of Callirhytis balanaspis (whose maker emerged the second spring).

Galls scattered among normal stamens in a shortened catkin of Q marilandica, cells 2.2 mm long.

Callirhytis florensis, new species

Host. — Quercus marilandica

Gall (pl. 1, fig. 1). — Scattered about among the stamens in a shortened catkin ; conical, slightly curved, blunt at apex, 2.2 mm. long by 1.0 mm. in diameter, of same color as the anthers but with longitudinal purple streaks, the surface sparsely covered with tangled hairs. Exit hole 0.6 mm. in diameter near apex.

Habitat. — The type material was collected at East Falls Church, Va., from a Q. marilandlca on May 10, 1931. Adults of both sexes emerged May 18 to 25, the largest number coming out on May 20. In the fall of 1932 nearly every acorn on this tree had a gall of Callirhytis balanaspis Weld, and the galls gathered on the ground in October produced adults that emerged on April 9, 1934.