16 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
sides; sheaths projecting, ventral spine 8 times as long as broad in 
side view, shorter than hind metatarsus. With width of head used 
as a base, the length of mesonotum ratio is 1.3; antenna 2.2; ; wing 4.4; 
onhoostian 5.9. ener 9.15-3.65 mm. Average of 20 specimens 2. : 
mm. 
Types.—U.S.N.M. No. 563885: Type and four paratypes. Para- 
types in American and Chicago Museums of Natural History, Museum 
of Comparative Zoology, and Academy of Natural Sciences of Phil- 
adelphia. 
Hosts.— Quercus coccinea, Q. velutina. 
Gall (pl. 2, fig. 14) —A depressed sphere, fleshy, bare, smooth, pure 
white or pinkish on one side, measuring up to 5 mm. in diameter by 3.8 
mm. high. On underside of leaf in October. Not common. Similar 
in external appearance to Biorhiza rubina Gillette on white oaks but 
with a different internal structure, the larval cell and nutritive layer 
being central instead of basal. 
Habitat.—The type is from galls collected on Q. coccinea in October 
1933 at East Falls Church, Va., adults emerging on March 20, 1935. 
Five paratypes are from galls on the same host collected at Vienna, 
Va. (Hunter), in October 1940, adults emerging on March 23, 1942, 
and March 31, 1948. Other paratypes are from galls on Q. velutina 
collected at East Falls Church in October 1940 and at Black Mountain, 
N. C., in 1941, and the adults emerged March 23, 1942, and March 31, 
1948. Galls on this oak have been seen at Evanston sal Glencoe, IIl., 
and at Burdett, N. Y. 
Genus CALLIRHYTIS Foerster 
CALLIRHYTIS BALANACEA, new species 
Agamic female.—Reddish brown, with eyes, clypeus, lateral and 
anterior parallel lines, foveae, propodeum, mesosternum, and dorsal 
abdomen black. Mesonotum covered with short, appressed pubes- 
cence. WVenation distinct, wing surface covered with short, dark 
pubescence, margin nonciliate, areolet lacking. Mesoscutum uni- 
formly granulate, grooves narrow, deep, obsolete anteriorly, median 
wanting. Scutellum finely rugose on a coriaceous background, disk 
high-arched. Antennae 14- or 15-segmented, first five segments as 
93:10: 25:21:15, the fourth not stouter than third. With the width 
of head used as a base, the length of mesonotum ratio is 1.4, antenna 
2.2, ovipositor 3.1, wing 3.5. Length of 104 specimens 3.0-4.5 mm. 
Average 3.64 mm. Mode 3.6 mm. 
Closely related to C. patiens (Bassett), which is smaller and has a 
flatter disk and smaller foveae; also to C. balanopsis Weld, which has 
a flatter disk and smaller foveae, less stout hind femora, a short me- 
dian groove, and the fourth segment of antenna stouter than third. 
