45° angle, hairy. Legs: Yellow-brown except the darker tips of the tarsi; somewhat hairy; tarsal claws simple. Wings: Large, projecting half beyond abdomen, clear, set with fine hairs, edges finely ciliate; veins clear brown, not very heavy; areolet of moderately small or smaller size; cubitus extending hardly two-thirds the distance to the basalis; radial cell open; the first abscissa of the radius almost arcuate with only a suggestion of an angulate form. Length: 1.5-2.2 mm., averaging nearer 2.0 mm.
- Male.—Differs from the female as follows: antenæ dark brown only distally, more or less distinctly 15-jointed, more distinctly serrate; thorax wholly yellow-rufous, the scutellum only slightly darker; foveæ divergent, smooth at base; abdomen very small, triangulate, piceous; legs yellow-brown with distal tarsal segments darker; wings with areolet moderately small, small, or closed; length, 1.7 mm.
- Galls (Pl. XXIV, Fig. 3).—Dense clusters of grain-like cells, yellow or yellow-brown. Bithalamous, though often several cells will fuse; the whole cluster rounded or elongate-oval, containing 20 to 40 or more cells. The cells are thin-walled, almost wholly hollow except for the partition separating the larval chambers. Apparently modified anthers of aborted, compacted aments, the clusters sessile on the young twigs of Quercus Wislizeni and Q. agrifolia.
- Range.—California: Alpine, Three Rivers.
- Types.—Ninety-nine females, 49 males, 12 clusters of galls, labelled Three Rivers, California; March 23, 1920; Q. Wislizeni; Kinsey collector. Holotype females, paratype females, males, and galls in the collections of The American Museum of Natural History; paratype adults and galls at Leland Stanford University, the U. S. National Museumn, and in the collection of the author.
Galls collected February 24 at Alpine showed the adults to have emerged at an earlier date, but galls collected at Three Rivers on the following March 23 did not give adults until soIme (unrecorded) later date. It is likely that the emergence dates of spring galls for more northerly latitudes or higher elevations are regularly later. Although I do not have adults from the galls on Q. agrifolia the galls appear so identical as to make the identification at least specifically certain. I secured 99 females and 49 males, which is not the usual ratio for a bisexual form in this group of Cynipidæ. Because of the early appearance of the gall on an evanescent part of the plant it is probable that this species has an alternate, agamic generation. The galls of this species resemble those of Neuroterus pallidus Bassett of the eastern United States, but in that species the clusters are borne at the ends of the aments instead of sessile on the young twig, distorting the whole ament.
Andricus spectabilis, new species
Plate XXIV, Figures 11 and 12
