Druon flocculentum (Lyon, 1996), comb. nov.

Andricus flocculentus Lyon, 1996: 181, female, gall.

[No photo of the gall is included.]

Gall. Clustered but discrete cells forming a woolly mass on the underside of the leaf midrib (Lyon 1996). Clusters ranging from 3 to 6mm in diameter, the pubescence is white to pale yellow. The individual cells are 2.5–3.0 mm long, ovoid and thin walled.

Biology. Only the asexual generation is known, which induces woolly leaf galls on Q. pungens and Q. obtusata (both Section Quercus, Series Leucomexicanae). Galls were collected in February-March. Adults probably emerge shortly afterwards.

Distribution. USA: TX (Lyon 1996); Mexico: Mexico City in this study.

Andricus flocculentus Lyon, NEW SPECIES
(Figs. 18, 19)

Gall. —(Figs. 18, 19).—Clustered, individual cells forming a woolly mass on the underside of the leaf midrib. Similar galls occur on other white oaks in the area, but no adults of A. flocculentus were reared from them.

Host.—Quercus pungens