Diplolepis unica, new species

Host. — Quercus stellata.

Gall (fig. 9).- — Spherical, 5-7 mm. in diameter, white, smooth, single, always on under side of leaf saddled on a vein so that when detached a depression (containing pedicel) and groove is left on the gall. Occurs in fall. Monothalamous. A section through a fresh gall shows a white fleshy interior containing a distinct but not free larval cell, a tinge of red or brown just under the outer layer.

Habitat. — The type material was collected at Ironton, Mo., in October, 1917, and adults emerged (in out-of-door cage near Chicago) on May 15, 1918. The writer saw galls at Poplar Bluff also, and at Hoxie, Little Rock, Hot Springs, and Texarkana, Ark; Palestine. Trinity, Cuero, Poerne, Austin, College Station, and Arlington, Tex.: and at Green Cove Springs, Fla. What seems to be the same gall occurs on Q. margaretta and lyrata also. The Pergande collection contained a gall from Virginia and a fly which emerged April 16, 1883, determined as this species.

- LH Weld: (1926) Field notes on gall-inhabiting cynipid wasps with descriptions of new species^©

Reference: https://www.biodiversitylibrary.org/page/7610635#page/302/mode/1up