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.

- Victor Cuesta-Porta, George Melika, James Nicholls, Graham Stone, Juli Pujade-Villar: (2022) Re-establishment of the Nearctic oak cynipid gall wasp genus Druon Kinsey, 1937 (Hymenoptera: Cynipidae: Cynipini), with description of five new species^©