Callirhytis subcostata, new species
Host. — Quercus stellata.
Gall (pl, 16, fig. 10). — Produced on the side of the acorn cup when the latter is about 4 mm. in diameter and dropping off when mature in late May. Green, 2.5-3.0 mm. in diameter, ribbed like a melon with about 16 grooves, pinkish in the grooves.
Habitat. — The types emerged April 1, 1950, from galls collected at East Falls Church, Va., on May 29, 1949. The nutritive layer was then about used up and the galls about ready to drop. This isolated tree had been visited almost every spring for many years but these galls had never been seen there before.
”- LH Weld: (1952) New American Cynipid Wasps From Galls©
Reference: https://www.biodiversitylibrary.org/page/15672479#page/385/mode/1up