Druon pattoni (Basset, 1881), comb. nov.

Cynips pattoni Bassett, 1881: 98, female, gall.
Andricus pattoni (Bassett): Weld (1952a).

Gall (Fig. 124). Fluffy, orange-brown woolly leaf galls on the underside of the leaf midrib, containing clusters of larval cells oriented perpendicularly to the leaf surface. The cells are completely hidden by short, dense pubescence. The largest clusters often extend for more than half the length of the midrib. Found on young trees, most often on leaves near the apex of strongly growing shoots. The galls resemble in their woolly covering those of D. quercusflocci (Walsh), but the latter are round rather than often elongate, with longer woolly hairs, and that species is only found on Q. alba.

Biology. Only the asexual generation is known, which induces galls on Q. chapmanii and Q. stellata (= Q. obtusiloba) (Section Quercus, Series Stellatae). Galls mature in October–November; adults emerge shortly afterwards under laboratory conditions or in February of the following year in the field.

Distribution. USA: Connecticut to Florida, Oklahoma, Texas (Burks 1979).

- 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^©