Callirhytis balanacea

Andricus coortus

Andricus albicomus

Callirhytis juvenca

Zopheroteras cuneatum

Callirhytis balanacea, new species

Host.--Quercus palustris

Gall.--A pip gall produced late in fall beside small acorns of the current season. Almost spherical, up to 6.3 mm in diameter, smooth, bare, green with a small black papilla at apex, secreting honeydew. Full grown and dropping off during October after which a thin, fleshy outside layer soon turns black, wrinkles, and dries down on the hard inner shell, 3.5 by 4 mm, within which is a thick nutritive layer containing the larval cavity.

Biology.--During October 1931 most of the larvae transformed into adults, which remained within the galls on the ground during the winter and emerged March 26 to April 2, 1932. 

Andricus coortus

Gall (pi. 1, fig. 5). — A bud gall in the fall consisting of 1 to 7 elongated, vertical, parallel cells each with a dense, thick, dark-colored wall, the whole forming an elongated o rounded mass projecting above the bud scales, the surface not smooth, covered with short pubescence.

Hosts. — Quercus douglasii and Q. dumosa.

Andricus albicomus

Gall:
A thin-walled conical gall about 5 mm. in diameter on the underside of a leaf in the fall, densely covered with pedicelled, stellate grayish-white hairs. Inside is a transverse basal larval cell with a distal cavity opening at apex. 

Host: 
Quercus garryana


Gall. — A midrib cluster on underside of leaf in fall similar to gall of C. lustrans (Beutenmueller), but smaller, mottled white and greenish with often a pinkish tinge when fresh, with a scar at apex 

Habitat. — The type locality is Young, Ariz., where Mrs. N. W. Capron collected galls on an undetermined oak November 1, 1935. Four flies emerged on March 20, 15 more by March 24, and one more by April 3, 1937. Agreeing with these is an adult taken ovipositing on Quercus pambelii at Williams, Ariz., on April 11, 1918.

Zopheroteras cuneatum, new species

Host: Quercus alba

Conical, red, 3.0-4.4 mm. long by 1.5 mm. broad at base, attached to the very base of the petiole in fall just as the leaves are turning. On young trees or sprouts from stumps. Rare.

Habitat: VA, MO, AR

New American Cynipids from galls