Druon fullawayi (Beutenmüller, 1913), comb. nov

Andricus fullawayi Beutenmüller, 1913: 244, female, gall

Gall (Figs. 31–32). Brown, elliptical, thin-walled, unilocular, with reticulate surface, covered with long soft
rusty brown woolly fibers. Gall 5–8 mm in diameter, found singly or in groups of two to many galls on the upper side of the leaf, along the midrib, cluster usually beginning at the base of the leaf. The long, soft hairs distinguish this gall from all other hairy leaf galls on white oaks.

Biology. Only the asexual generation is known, which induces leaf galls on Q. garryana, Q. douglasii, Q. lobata (Section Quercus, Series Dumosae). Galls do not dehisce from their host leaf, instead falling to the ground with the leaves in autumn; adults emerge in March of the following year.

Distribution. USA: California (Burks 1979) and Mexico: Zacatecas.

Andricus fullawayi

Quercus douglasii, dumosa, engelmanni, garryana, lobata
Leaf galls, detachable
Fig 109. Single or cluster, woolly. Upper side.

Fig 109 On upper side on midrib, often erect, pubescence fluffy, exit hole at apex. Adults out Mar.20 (Descanso), Apr. 5 (Monrovia).

Andricus fullawayi sp. nov.

Gall.— In a mass from a few to twenty or more covered with brownish or reddish-brown wool on the underside of leaves of white oak (Quercus lobata). Monothalamous. The individual gall is thin shelled and oval, light brown with the surface finely granulated. The galls stand upright on the leaf and are close together. The individual gall is 2 mm. high and 1 to 1.5 mm. wide.

Habitat. — Palo Alto, California.

The gall very much resembles those of Andricus langerus and Dryophanta ignota. It is the same species which Mr. David T. Fullaway referred to Andricus flocci (Ann. Ent,. Soc. Am., vol. iv, 1911, p. 352), but it is not this species. The seed-like galls of flocci are different as well as the flies. The male of fullawayi is not known.

Andricus fullawayi

This cynipid wasp induces small, oval galls covered with a dense mat of long, straw yellow to fawn-colored hairs in spring and early summer.

Galls occur singly on the ventral midrib of leaves of most white oaks.