Callirhytis perrugosa

Quercus alba
"Root" galls
Taken ovipositing in terminal buds of sprouts Apr 13-May 3. Probably from a root gall like Fig 37.

[Photo caption]
Callirhytis perrugosa thought to have come from a similar gall [the included figure is of Callirhytis ellipsoida on Quercus bicolor] on roots of Q alba. Ovipositing in buds of saplings Apr 13-May 3.

Callirhytis perrugosa, new species

Host.--Quercus alba

Habitat. — The type is selected from a series of over 50 specimens collected at East Falls Church, Va., in seven different years at dates from April 13 to May 3. They were taken while ovipositing in the topmost buds of 3-6-foot saplings or strong sprouts from stumps of white oak, but attempts to determine the resulting gall have so far failed and so have attempts to find the gall from which these flies must have just emerged. Paratypes are from Washington, D. C, Great Falls, Md., Malaga, N. J., and Castle Rock and State College (May 7), Pa.