or punctate in places. Abdomen: Small, long-pedicellate, irregularly triangular, piceous to black, lightest at the posterior tip, apparently smooth and naked. Legs: Rufous yellow, light piceous on the coxæ, tips of tarsi darker; tarsal claws simple. WINGS: Large, extending more than half beyond the abdomen; finely set with hairs, margins ciliate; veins light brown, cross-veins and subcosta darker; areolet moderate in size; cubitus faint, reaching the basalis at the mid-point, but hardly evident there; radial cell open; second abscissa of the radius almost straight, the first abscissa slightly arcuate without a projection. Length: 1.7–2.2 mm.
- Galls (Pl. XXIV, Fig. 2).—Sticky cells protruding from buds. Each cell is monothalamous, about 2×3 mm., oval, but with rather flattened ends; only microscopically roughened, marbled red to dark green when fresh, drying brown; thin-walled, hollow. Under the bud scales, but often largely protruding; covered with a sticky secretion when fresh; often several in a bud; on Quercus Wislizeni.
- Range.—California: Redding.
- Types.—Thirteen males and nine infested buds. Holotype male and paratype males and galls in the collections of The American Museum of Natural History; paratype males and galls in the'collections of Leland Stanford University, the U. S. National Museum, and of the author. Labelled Redding, California; April 2, 1920; Kinsey collector. Most of the insects are partly imperfect.
These galls are distinct in appearance from other Pacific Coast bud galls, but probably reach maturity in such a short time that they will need to be discovered at just the opportune season. The very sticky secretion on the surface proves attractive to ants, and likely attracts wasps and bees. I am surprised to find all of the thirteen adults bred are males, and am at a loss to explain the situation. Thq insect shows relations to some species of Neuroterus, but does not belong to the typical group of that genus.
Andricus gigas, new species
Plate XXIV, Figure 14
