Amphibolips globus sex. gen.

Quercus imbricaria
Bud galls
Sex. gen. Globular, green with a waxy bloom, up to 18 mm in dia, wall 1 mm thick, from lateral buds in June, not deciduous.

[Agamic generation listed on Q palustris and falcata]

[Photo caption]
[No photo] Q palustris. Galls of the sex gen are found in June, produced from weak lateral buds on growth of the previous year, 18-20 mm in dia, green with a waxy bloom, not deciduous. Galls collected June 26 gave adults June 28, 30, July 2, 4 - twenty from 200 galls. Heavily parasitized.

Fig. 294. Galls of sexual generation produced from weak lateral buds of the previous year's growth on pin oak saplings or on sprouts from stumps. Green, fleshy, bare, wall 1 mm thick, up to 18 mm in dia, not deciduous. Adults emerged June 28, 30, July 2, 4 (VA). They are very heavily parasitized.

Amphibolips globus, new species
Sexual generation

Host.--Quercus palustris

Gall.--A bud gall in June produced from weak lateral buds on previous year's growth of saplings 1 to 3 feet high, on sprouts from stumps and on lower limbs of small trees, occasionally from dormant buds on main trunk of trees. In good light, deep green with white spots at attachment of radiating fibers inside; in deep shade, more or less etiolated. Globular, firm, fleshy, bare, up to 18 mm. in diameter, not deciduous. Wall 1 mm. thick. Central cell relatively large, supported by many coarse, branching, radiating fibers. Larval cell 6 mm. by 3.2 mm. and its wall 1.5 mm. thick with big cells at base of the radiating fibers. Exit hole 2.2 mm. in diameter made while gall is still green. After the emergence of the maker the gall turns brown and becomes wrinkled. Many undersized galls are parasitized. Out of more than 200 galls collected only 20 makers emerged.

Habitat. — The type series of galls was collected at East Falls Church, Va. June 26, 1948. Adults emerged June 28, 30, July 2, 4, 1948. None of these galls was seen at this place in 1949, in 1950, or in 1951. Galls had been seen at Rosslyn and Lucketts, Va., Washington, D. C, and Lanham, Md.