Quercus imbricaria
Leaf galls, detachable
Woolly midrib cluster on under side of leaf in fall. Wool comes off clean leaving a conical gall with a sunken crenate top. Fig 209.

[Photo caption]
This gall on Q imbricaria with the wool easily detached may be what Ashmead described as the "Laurel-oak Woolly Gall," Neuroterus laurifoliae Ashm (the type now lost)(no Neuroterus on a red oak) or Callirhytis perplexa from an unknown oak in MO or Callirhytis infuscata described from Q catesbaei [laevis].

Neuroterus laurifoliae

Globose, kernel-like leaf galls occurring singly or in clusters and covered with long, loose, fawn-colored wool, diameter of kernel 2 to 2.5 mm, on Q laurifolia, Q imbricaria.

Neuroterus laurifoliae Ashmead

Specimens of the galls of this species were collected by Dr. Mel. T. Cook in Illinois on the leaves of the shingle oak (Quercus imbricaria) and by Miss Annette F. Braun at Cincinnati, Ohio, on the same kind of tree. Heretofore it was known from Florida, on the laurel oak (Quercus laurifolia).

Neuroterus laurifoliae, n. sp.
The Laurel-oak wooly gall

Galls on the Laurel Oak (Quercus laurifolia)

Gall. An oblong, wooly gall on the upper or lower surface of the leaves; the wool is fawn colored, long and fine, covering three or four, sometimes more irregularly rounded, flattened disks, in the centre of which live the flies; they are attached to the midrib by a nipple-like point; the disk or cell is concave above and measures .08 to .10 inch in diameter.

Several specimens bred. The fly very strikingly resembles Neuroterus verrucarum, but the gall is very distinct and cannot be confounded with it.