Phylloxera caryaegummosa Riley

Galls are spindle-shaped, suspended from the underside of leaf of Carya alba (= ovata) by a slender petiole; they are white or yellowish, pubescent and sticky. In Illinois and Missouri, USA. Alatae are undescribed and the life cycle is unknown.

Phylloxera caryaegummosa

Carya sp.
Conical or globose leaf galls with distinct orifice and containing aphids
Gall large, walls fleshy, pedunculate and more or less elongated, suspended from the under surface by a slender petiole, quite sticky when fresh, splitting at the apex into several long filaments.

Phylloxera caryae-gummosa Riley.

Forming pedunculate, ovoid or globular galls on the under side of leaves of Hicoria alba [Carya tomentosa]; the gall white or yellowish, pubescent, and gummy or sticky; opening below in a fibrous point. The eggs are almost spherical, pale and translucent. Larvae, motherlouse and pupa quite pale, the red eyes and eyelets strongly contrasting. The winged insects with difficulty distinguished from some of the other species, a difficulty made all the greater from the fact that other species get caught in the sticky surface of the gall.

Phylloxera caryaegummosa

Globular and suspended by a slender filament from below; yellow or white and pubescent and sticky; apex splits at maturity into several filaments.