Callirhytis lanata

This gall, which occurs as a woolly mass on the under side of the leaves of several species of the red oak group, is composed of angular galls closely joined. When young the galls are covered with a whitish wool which later turns brown.

Callirhytis lanata

Hemispherical brownish woolly mass on midrib on underside of leaf of Q rubra and velutina. Made up of a cluster of easily detached separate angular galls which drop to the group in the fall in Oct before the leaves, each covered with a dense coating of wool. They are then fleshy and apparently solid as the larval cavity is very minute. Adults emerge the second and third springs in April.

Callirhytis lanata

Quercus coccinea, falcata, ilicifolia, marilandica, rubra, texana [buckleyi], velutina
Leaf galls, detachable
Woolly midrib cluster on under side of leaf in fall, dropping before the leaves.

[Photo caption]
On Q velutina. Also on Q coccinea, rubra, ilicifolia, falcata, marilandica, texana [buckleyi]. Galls drop in Oct and the wool weathers away during the winter. Adults emerged the second, third, and fourth springs Apr 1-7 (DC); Apr 4-13 (IL).

Dryophanta lanata, n. sp.

Galls. During late summer and autumn the galls of this species are found on the under side of leaves of Quercus rubra and Q coccinea, appearing externally as little bunches of compact brown wool and hardly distinguishable in outward appearance from the galls of Andricus flocci Walsh. The galls seldom occur singly, but usually in clusters of from four to eight. A cluster of eight galls when fully grown will measure about 3/8 of an inch in width by 5/8 of an inch in length. An individual gall when denuded of its covering is in the form of an irregularly shaped cone with a bulging base, the diameter of the base being three or four sixteenths of an inch, which is nearly twice the height.

The galls fall to the ground in the autumn in advance of the leaves, and the flies emerge the following summer. The galls are abundant at Ames, Iowa and I have taken a number in the vicinity of Champaign, IL.

Described from two bred females from galls taken at Ames, Iowa. Male unknown.

Callirhytis lanata

Dryophanta lanata

This species is here recorded from two new host oaks, Q. rubra and Q. texana, and from the following localities: Evanston, Wilmette, Glencoe, Ravinia, Fort Sheridan, Waukegan, and Glen Ellyn, IL.; Minneapolis (C. J. Weld), Minn.; Delevan (D. Watt), Wis.; North East, Pa.; Ithaca (J. C. Bradley), Riverhead (C. R Crosby), and Medina, N. Y. ; Bluemont, Va. ; Poplar Bluff, Mo. ; Hugo, Okla. ; Palestine, Austin, and Mineola, Tex. ; and Troy and Dothan, Ala. Galls collected at Evanston in fall of 1916 contained pupae and larvae on September 17, 1917, and adults and larvae on November 26. Adults issued April 6 and April 22, 1918, and about 50 more came out April 10 and April 18, 1919. The.se agree with the type in National Museum.

The species is here transferred to Callirhytis.

Brodie found the galls common about Toronto on red and black oak, forest trees as well as second growth. They appear in August, mature in October dropping before the leaves, the producers emerging May 8 and June 24, 1888, May 1, 1889, and April 4-July 24, 1898, in each case from galls collected on the ground under the trees the previous fall. Beutenmueller collected galls on red oak near Fort Lee, N. J., in October, 1922, and cut flies out of the galls in January, 1924.

Dryophanta lanata

A cluster of several light brown, wooly galls, sometimes pink-tinted, found on the under side of the leaf. Individual galls cone-shaped, monothalamous, attached by tip of cone to common center. About 5 mm wide, 5-7 mm high. The galls fall from the leaf in early autumn. The flies emerge the following spring. Common on scarlet oak, Quercus coccinea, figured on red oak, Quercus rubra. [The photo (Figure 25) Stebbins lists as C lanata resembles C piperoides; presumably an error]

Dryophanta lanata

Bunches of pale brown wool on under surface of leaf, each with 2 to 8 triangular or irregularly conical cells, diameter 5 to 15 mm, on Q rubra, coccinea, velutina, marilandica, phellos, nana [ilicifolia].