Page:New Pacific Coast Cynipidæ (Hymenoptera).pdf/10

extending slightly along the margin; first abscissa distinctly angulate but without a projection, and slightly infuscate where it joins the subcosta. Length: 1.5-2.2 mm., averaging nearer 2.2 mm.

Galls (Pl. XXIV, Fig. 8).—Small, fleshy-walled capsules imbedded in the leafblade. Monothalamous. Spherical or more elongate, about 6. mm. in diameter (perhaps larger when fresh), leaf-green, drying brown, projecting about symmetrically from either surface of the leaf. The walls are.thick, succulent, the cavity (in shriveled galls) about oval, 2.×3. mm., with a distinct larval cell lining, but the cell inseparable (at least in the shriveled gall). On the very young leaves of Quercus Kelloggii.

Range.—California: Santa Rosa and Redding.

Types.—Six females and twenty galls; holotype female, paratype females, and galls in The American Museum of Natural History; paratype females and galls in the author's collection, and galls at Leland Stanford University and the U. S. National Museum. Labelled Santa Rosa, California; March 16, 1920; Kinsey collector. Some of the adults were cut from old galls and are imperfect.

At the time the galls were collected they were very fresh and succulent, on the very young, unfolding leaves of the black oaks, but inasmuch as adults emerged from some of these galls, in spite of their immediate shriveling on collecting, it would appear that the insects complete their development in a very short period in the early spring. Such species of cynipids are usually bisexual, so the male may yet be discovered for this species.

Andricus serricornis, new species
Plate XXIV, Figure 3

Female.—Thorax almost smooth, rufo-piceous; abdomen piceous; antennæ yellow to brown, rather serrate; parapsidal grooves distinct, other thoracic grooves lacking; areolet small. Head: Not quite as wide as the thorax, broadened slightly behind the eyes, a prominent median elevation; piceous or black, mouth-parts brown; finely shagreened or coriaceous, the face sparingly hairy. Antennæ short, brown,darker distally, yellow on four or five basal joints; slightly hairy, the second segment short, almost globose, the third longest and most slender, the last almost twice as long as the preceding; 14-jointed, the last ten joints giving a rather serrate appearance to the antennae. Thorax: Mesothorax rufo-piceous; almost smooth, very finely coriaceous with a very few scattering hairs especially on the edges; parapsidal grooves distinct, deep, continuous to the pronotum, slightly divergent and finally curved apart anteriorly, slightly convergent posteriorly; median groove lacking or incompletely indicated; anterior parallel lines lacking or barely indicated; lateral lines lacking; scutellum hardly longer than wide, finely rugose, rufo-black, the two basal foveæ broad, shining, not quite smooth, separated by only a fine ridge; pronotum darker rufo-piceous, irregularly aciculate laterally, sparingly hairy; mesopleuræ rufo-piceous, almost smooth and shining, partly irregularly aciculate. Abdomen: Piceous black; smooth and shining, very sparingly hairy on the second segment basally; the abdomen produced dorsally, the second segment hardly covering half the area, edges of most of the segments well rounded ventrally; ventral spine lighter in color, slightly hairy; the hypopygium produced slightly; ventral valves at about a