NEW AMERICAN CYNIPIDS FROM GALLS—-WELD 15 
high, malar space 0.4 eye with groove, a faint ridge on front from 
between antennae, antennae 13-segmented, lengths as (scape) 138:6:18: 
15:12:11:9:9:8:8:7:7:11. Sides of pronotum bulging. Meso- 
scutum shining and coriaceous between the distinct parapsidal grooves. 
Distal part of scutellum rugose, pubescent, not broader than groove 
at base, overhanging metanotum behind. Mesopleura smooth and 
shining. Wings wanting. Hind tibia and its tarsus about equal. 
Claws simple. Carinae on propodeum noi distinct. Abdomen longer 
than head plus thorax, all tergites visible, ventral spine slender, about 
20 times as long as broad in side view, longer than hind metatarsus. 
With width of the head used as a base, the length of mesonotum ratio 
is 0.7; antenna 2.8. Length 2.55 mm. 
Differs from described species in the longer ventral spine and in 
having 13-segmented antennae. 
Type—U.S.N.M. No. 56384; Holotype. 
Gall (pl. 2, fig. 18). —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. 
Host. —Quercus alba. 
Habitat.—On October 17, 1938, the living adult was cut out of a gall 
collected just a year previously at Hast Falls Church, Va. Galls have 
been seen at Ironton, Mo., and at Hot Springs and Texarkana, Ark. 
Genus DRYOCOSMUS Giraud 
DRYOCOSMUS ALBIDUS, new species 
Agamic female.—Black; scape, mandibles, and legs beyond coxae 
brownish. Head coriaceous, dull; from above transverse, not quite as 
broad as thorax, cheeks broadened behind eyes, occiput concave; from 
in front malar space one-fourth eye without groove or ridges, antennae 
14-seomented, lengths as (scape) 12:7:24:18:10:9:8:8:7:7:7:7: 
6:9. Sides of pronotum pubescent, with parallel ridges. Mesoscutum 
shining, smooth except for microcoriaceous sculpture along the per- 
current grooves, bare except for a few scattered hairs. Puts of scutel- 
lum large, shallow, shining, separated by a thin septum; disk coria- 
ceous back of septum, rugose peripherally, overhanging metanotum 
behind. Mesopleura largely bare, coriaceous with a few faint striae. 
Wing hyaline, pubescent and ciliate, veins brown, first abscissa of 
radius angulate, areolet reaching one-sixth way to basal, cubitus almost 
reaching basal. Tarsal claws simple. Carinae on propodeum parallel. 
Abdomen longer than head plus thorax, not gibbous below petiole, 
length to height to width as 39:29:28; lengths of tergites along dorsal 
curvature as (petiole) 2:51:24:32:30:19:6, all shining although 
IV-VI have fine punctures and IT and VII have scattered hairs on 
