Druon linaria Kinsey, 1937, stat. rev., comb. rev.

Druon linaria Kinsey, 1937: 57, female, gall.
Andricus linaria (Kinsey): Weld, 1952a: 306

Gall (Fig. 112). Creamy white furry leaf galls in clusters (usually of 3 or fewer galls) on the underside of leaves, at the base of the leaf, yellowing a bit with age. Individual hairs on the gall are straight, not long. Each cluster closely compact, circular, up to 9 mm in diameter, 3 mm high.

Biology. Only the asexual generation is known, which induces woolly leaf galls on Q. oleoides (Section Virentes). Galls mature in late autumn; adults emerge in February–March of the following year.

Distribution. Mexico: Eastern Sierra Madre Oriental, Tamaulipas (Kinsey 1937).

Comments. Pujade-Villar et al. (2016) erroneously synonymized this species under A. quercuslanigera (Ashmead). After revising the type material, both species are transferred to Druon and we consider D. linaria and D. quercuslanigerum to be two independent valid species with distinct morphological differences.

Druon linaria, n. sp.
Agamic form

Gall. — Wool covering creamy white, yellowing a bit with age; the individual hairs fairly straight, not long but closely compact clusters closely in diameter and mm. in length, and completely covering the larval cells; all compact, circular in outline, up to 9. mm. 5. mm. high. The larval cells averaging 3.0 rather slender, averaging only 3 or fewer.

Host. — Quercus oleoides, a member of die Q. virginiana group of evergreen white oaks.

Range. — Tamaulipas: Ciudad Victoria, 21 W, 3200L —- Probably confined to the single host in a Eastern Sierra of Mexico.

Life History. — Adults: February 10, 25. March 10.

The oak host of this species, Quercus oleoides, is a close relative of Q. virginiana of the United States. The gall is distinct from all others here described in being creamy white, small, rounded masses containing only two or three larval cells in the type locality of linaria, Druon malinum occurs on the broader leaved evergreen oak. Q, polymorpha.