Aceria vaga

Aceria caryae

Caryomyia stellata

Eriophyes? sp. Cecidium nov.

Small galls in the axils of the lateral veins of the leaflets. Above marked by a light colored angular area 1-1.5 mm dia. Below a small mass of tissue (the gall proper) fills the angle, covered by a fine close pubescence. Chamber within of small diameter, irregular in shape. The characteristic mites were definitely observed. They are white in color. On some leaflets every angle made by the midvein branching into the lateral ones was occupied by a gall. On H cordiformis, in Athens County Ohio, August.

Eriophyes? sp.

Leaf edge gall; edge inrolled involving little more than the teeth. Variable in length from .5-2 cm. or longer, 1 mm. -2 mm. thick. Outer surface of affected area finely roughened; color of under side of the leaf. Thompson states that mites live within the fold. His report is the first one on this gall. Species of hickory on which specimens were found not determined. 

Cecidomyia sp. [assignment of this species as C stellata based on Gagne caption of Wells' reproduced figure 11a]

On leaf, under side, rather large conic gall, whose distal 1/2-1/3 constitutes a very slender apical process. Through this passes the fine canal leading to the depressed, sub-globular chamber in the proximal part of the gall. The galls are either erect or more generally tilted to one side, always arising from one of the larger veins. 5-8 mm. long, 2.5-3.5 mm. wide at base. Outline of the flaring sessile base generally angular. Attenuate distal portion turning dark early. Light greenish yellow to brown when old. Smooth. Walls of chamber thick. A slender probable variety of this is figured in 11a, pl. 1. Collected in Hocking County, Ohio, on H. alba. July. 

A Survey of the Zoocecidia on Species of Hicoria Caused by Parasites Belonging to the Eriophyidae and the Itonididae (Cecidomyiidae)