Undetermined species

Spangle gall. Concave above with no papilla in center, convex below without ring-like ridge, covered with whitish bloom, 3 mm in diameter. On Q bicolor and macrocarpa in August. Not reared.

Xystoteras volutellae

Quercus lyrata, macrocarpa
Leaf galls, detachable
The type gall is like Fig 247.

[Presumed synonyms]

Quercus bicolor
Leaf galls, detachable
Spangle, 3 mm in dia, in numbers on under side in fall. Fig 222.

[Photo caption]
Never reared. On Q bicolor. Found in Chicago area in Sept.

Quercus macrocarpa
Leaf galls, detachable
Cylindrical spangle on ground at Ft Worth TX on Nov 2. Fig 247

[Photo caption]
Never reared. On Q macrocarpa. Found on ground Sept 1 at Fort Worth TX. The type gall of Xystoteras volutellae is similar to this.

Xystoteras volutellae, sp. n.

Host: Quercus macrocarpa

Gall--A conical, bluish-gray gall, from 3 to 3.5 mm high by 2.5 mm in diameter at base; occurring singly or in great numbers on the under surface of leaves of Quercus macrocarpa in Riley County, KS. The top of the gall is truncate and internally it is hollow, with the larval cell or kernel, resembling a minute nipple, situated at its base. The gall is attached to the leaf by a few fibres and may easily be detached. The colour of the gall is produced by a powdery or pruinose bloom which completely covers it when fresh.

The wasp, according to Mr Marlatt, issues from the gall early in January.

Range: KS

Xystoteras volutellae

Host: Quercus macrocarpa

Hemispherical or conical, attached to the under surface of the leaf
Single or clustered, conical, bluish-gray, monothalamous leaf galls, height 3 to 3.5 mm, diameter 2.5 mm, on Q macrocarpa.

Phylloteras volutellae (Ashmead)

Host: Quercus macrocarpa

Small (3.5 mm) cylindrical galls on underside of leaf of Quercus macrocarpa

Distr: Kansas

Weld, believing that the type of Xystoteras volutellae had been lost, erroneously designated a series of specimens, collected at Texarkana, Arkansas, on Quercus lyrata as lectotypes (sic!). These were widely distributed to various museums. After he located the "lost" type, Weld acknowledged the error and stated that the specimens from Texarkana represented a new species that should be described. This was never done, however, so a description of this new species is provided here.