Callirhytis pulchra (sexgen)

Neuroterus quercusbatatus (sexgen)

Andricus pulchra

white, shot-like catkin gall

Neuroterus batatus (Fig. 8), pale bluish bloom, corky, many larval cells

Pachypsylla mamma (Fig 6)

nearly cylindrical, apex rounded bluntly

Pachypsylla venusta (Fig 8)

on petioles, several compartments

Pachypsylla vesiculum (Fig 5)

flat, blister-like, convex with a small nipple

Pachypsylla gemma (Fig 7)

variable in shape and size, woody, numerous cells

Pachypsylla cucurbitae (Fig 4)

on under side of leaf, concave in the middle, with a small nipple

Callirhytis seminator

white or pinkish, woolly

Callirhytis clavula, usually on white oak