Compsodryoxenus humilis, new species

Host. — Quercus chapmani Sargent and Quercus stellata Wangenheim.

Gall. — A slight spindle-shaped enlargement at base of one-year- old sprouts in patches of runner oak. In autumn they are on current year's growth. Maximum diameter of gall is about twice that of normal shoot. Cells are scattered, not nested, just under the bark, about 1.5 by 2.0 mm. and extending about 1.25 mm. into the wood, the deeper part narrower.

Habitat. — Type locality, Ocala, Florida. The galls were collected October 30, 1919, in a patch of Quercus chapmani, Hopkins U. S. No. 15634c. These galls then contained larvae and pupae. The type fly was cut out January 12, 1920. Other galls were collected on same oak at Green Cove Springs, November 23, 1919, containing adults which were cut out on December 1. One gall was taken on Quercus stellata October 11 at Marianna, and lighter colored flies similar in structure were cut out December 6.

Loxaulus humilis

Quercus chapmani, stellata
"Root" galls
Cells at the base of the swollen current year's growth of runner sprouts in the fall. Cells not nested.

[Photo caption]
Cells at base of swollen current year's growth of runner sprouts of Q chapmani. Cells not nested.