On leaf, under side, small, conic galls, generally found in pairs
closely appressed to each other but not confluent. Distal attenuate
⅓ rather sharply constricted from the sub-globular ⅔ of the gall and
generally turned to one side. 2 mm. high, 1½-2 mm. broad at base.
Yellowish in color, definitely and constantly pubescent. Interiorly the
lining of the sub-globular larval chamber is deep blue-black in color.
Walls of medium thickness. Comparatively large region of the base
involved in the attachment of the gall.
Collected in Hocking County, Ohio, on _H. alba_, July.
Type specimens at Ohio State University.