Zopheroteras guttatum, new species

Host: Quercus palustris

Gall: Almost spherical, smooth, bare, with purple spots on a cream background, attached singly on under side of leaf on a secondary vein, dropping in early October. From 1.4 to 2.5 mm. in diameter. Pure white inside with the minute larval cavity central.

Habitat. — Type locality East Falls Church, Va. Galls were collected in October in eight different years; adults emerged the second spring in each case on the following dates: March 6, 20, 25, 29, April 1, 3, 7. Buds on pin oak at that time show no signs of swelling. Oviposition not observed. Alternating generation unknown.

Zopheroteras guttatum

Quercus coccinea, imbricaria, palustris, texana [buckleyi]
Leaf galls, detachable
Spherical, 1.45-2.5 mm with purple spots, single on under side on secondary vein in fall.

[Photo caption]
On Q palustris. Also on Q imbricaria, texana [buckleyi]. With purple spots, single on under side of leaf on a secondary vein, dropping in Oct. Adults emerged Mar 6-Apr 7 the second spring.