NEW AMERICAN CYNIPIDS FROM GALLS—-WELD 9 
parapsidal grooves deep, narrow, smooth, percurrent, anterior and 
lateral lines smooth, no median. Disk of scutellum finely rugose, 
pubescent, with two smooth oblique pits at base. Mesopleura mostly 
bare, shining, with faint striae. Carinae on propodeum straight, 
parallel. Wing pubescent and ciliate, veins brown, first abscissa of 
radius arcuate, areolet reaching one-sixth way to basal. Tarsal claws 
with a tooth. Abdomen longer than head plus thorax, lengths of ter- 
gites along dorsal curvature as 52:18:7:5:1:7, exposed parts of ter- 
gites smooth, II with pubescent patches on sides at base, ventral spine 
in side view seven times as long as broad, shorter than hind metatarsus. 
With the width of the head used as a base, the length of mesonotum 
ratio is 1.8, antenna 2.3, wing 4.2. Length 1.9-2.35 mm. Average of 
20 specimens 2.17 mm. 
Types —U.S.N.M. No. 56378: Type and three paratypes. Para- 
types in the American and Chicago Museums of Natural History, Mu- 
seum of Comparative Zoology, Academy of Natural Sciences of Phila- 
delphia, and California Academy of Sciences. 
Gall (pl. 1, fig. 5).—A bud gall in the fall consisting of 1 to 7 elon- 
gated, vertical, parallel cells each with a dense, thick, dark-colored 
wall, the whole forming an elongated or rounded mass projecting 
above the bud scales, the surface not smooth, covered with short pubes- 
cence. 
Hosts.— Quercus douglasii and Q. dumosa. 
Habitat.—The type is from a series of seven living adults cut out of 
galls on Quercus douglasti at Colfax, Calif., on November 18, 1935. 
Four paratypes are from same host at Ukiah, Calif., cut out Febru- 
ary 2, 1940, and six from Lakeport; one is from Q. dumosa at Banning, 
Calif. 
ANDRICUS COSTATUS, new species 
Female.—Head dorsally, base of antennae, sides of pronotum, median 
area of mesoscutum, disk of scutellum and legs reddish brown, rest 
of body almost black. Head coriaceous; from above transverse, occiput 
only slightly concave; from in front broader than high, cheeks broad- 
ened behind eyes, interocular area broader than high, malar space 0.4 
eye and faintly striate, antennae 14-segmented, lengths as (scape) 
14:6:11:11:10:9:8:8:8:7:7:6:6:9, the last conical. Sides of pro- 
notum bulging. Mesoscutum microcoriaceous, shining, almost bare, 
parapsidal grooves deep, narrow, percurrent, anterior and lateral lines 
obscure, no median. Disk of scutellum circular, rugose; pits narrow, 
deep, smooth. Carinae on propodeum straight, parallel, enclosed area 
smooth, broader than high. Mesopleura bare, shining, smooth in large 
part. Wing pubescent and ciliate, veins brown, not clouded, first 
abscissa of radius angled, areolet reaching one-seventh way to basal, 
cubitus almost reaching basal, a faint cloud in first cubital cell. Claws 
570712—44-_2 
