foveæ; mesopleuræ bright rufous, darker toward the tegule and ventrally, shining, partly smooth, mostly puncto-aciculate, hairy. Abdomen: Rufous to bright piceous; smooth, only microscopically punctate, sparingly hairy on the sides basally, and on the ventral spine and valves; as broad or broader than long, the second segment covering only somewhat more than half the area, extending only somewhat farther dorsally, the ventral edges of the segments moderately curved; ventral spine fairly long and slender, ventral valves at an angle of 60°. Legs: Rufous, darker to black on the trochanters and hind tibia and tarsi; punctate and hairy, most densely so on the tibiae and tarsi; tarsal claws simple. Wings: Clear, set with fine hairs, margin ciliate; veins brown, distinct; areolet moderately large; cubitus fading out before reaching the basal vein; radial cell open, tip of radius showing some remnant of the subcosta, the first abscissa of the radius angulate, the projection into the radial cell blunt and not prominent, the vein somewhat infuscated. Length: 4.2 mm.
- Gall (Pl. XXIV, Fig. 13).—Large, irregular, tuber-like, woody swellings of the bark and new wood of roots. Agglomerate. The swellings are very irregular, smooth and rounded when fresh, roughening with age; the fresh bark covering is more reddish brown than on the normal roots; length up to 10.5 cm., the diameter 7.5 cm. on large galls. Affecting both wood and bark, including wood below the normal line of the bark; larval cells lying toward the bark, oval, 3.5 by 4.5 mm., with a thin, distinctive tissue lining the cells, but not separable from the wood. On the sides of large roots, well below the surface of the ground, on Quercus Kelloggii.
- Range.—Oregon: Ashland.
- Types.—Holotype female and seven paratype galls; female and galls at The American Museum of Natural History; galls at Leland Stanford University, the U. S. National Museum, and in the author's collection. Labelled Ashland, Oregon; April 6, 1920; Kinsey collector.
A cave-in of a railroad embankment had exposed these galls. The single female was found running over the surface of the galls, and was identified as the producer of these by recovering an immature adult which had not emerged from the galls. Almost all of the insects had emerged, but at least one was still alive on April 6. Very likely the species is agamic, at least in this generation.
Andricus pedicellatus, new species
Plate XXIV, Figure 10
Mostly black, except the brownish-yellow legs; entire thorax except scutellum smooth, shining, and naked; parapsides the only apparent grooves; veins brown, areolet small.
Female.—Head: Not quite as broad as the thorax, only slightly widened behind the eyes; black, mouth-parts brownish rufous; rugoso-granulose, most rugose on the front, very sparingly hairy, rather densely hairy on the lower part of the face; antennæ brownish rufous at base. Thorax: Entirely black; mesothorax elongate; smooth and shining, slightly coriaceous anteriorly, naked; parapsidal grooves distinct, continuous to the pronotum, curved apart anteriorly, gradually and rather closely convergent at the scutellum; median groove lacking; anterior parallel and lateral lines only very slightly indicated; scutellum elongate, rounded at the pos-