Callirhytis glomerosa, new species

Host: Quercus coccinea

Gall: A smooth greenish or brownish (in sun) bud gall in September or October around 3 mm in diameter, over half of it projecting beyond the bud scales, dropping when full-grown and then slightly pubescent at the base. Adults emerge the second spring.

Habitat: The type is from a gall collected at East Falls Church, Va., in late September 1933 and the adult cut out Oct. 16, 1934. Paratypes are from Vienna and Alexandria, Va. Similar galls have been seen on northern red oak, Spanish oak, and on Quercus ilicifolia Wangenh.

Callirhytis glomerosa Weld, which induces bud galls on red oaks

Undetermined species [tentatively presumed to be the same gall later named C glomerosa]

Similar [to Andricus mamillaformis] on Q rubra in the fall

Callirhytis glomerosa

Quercus coccinea, falcata, ilicifolia, rubra, texana [buckleyi]
Bud galls
Smooth, green or brown (in sun), in fall, about 3 mm in dia, over half projecting beyond bud scales.

[Photo caption]
On Q rubra. Also on Q coccinea, ilicifolia, falcata, texana [buckleyi]. Galls drop when mature in early Oct. (IL). Galls are pubescent at the base. An adult emerged the second spring Apr 11, another Apr 20.

[Presumed synonyms]

Quercus imbricaria
Bud galls
Probably Callirhytis glomerosa. Green, smooth, half exposed beyond the bud scales, in fall. Never reared.