Callirhytis fructicola, new species
This gall consists simply of the white kernel or larval cell embedded in the interior or meaty portion of the acorn, or then on the outside near its base, generally hidden by the cup.
Two or three acrorns in Dr. Riley's collection, affected by this species, when cut open, revealed more than a dozen larval cells, closely pressing upon one another, and filling the whole interior of the acorn.
Six female specimens, reared April 5, 1873.
”- William Ashmead: (1896) Descriptions of new Cynipidous Galls and Gall-Wasps in the United States National Museum©