20 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
tudinal purple streaks, the surface sparsely covered with tangled 
hairs. Exit hole 0.6 mm. in diameter near apex. 
Habitat—The type material was collected at Kast Falls Church, 
Va., from a Q. marilandica on May 10, 1931. Adults.of both sexes 
emerged May 18 to 25, the largest number coming out on May 20. 
In the fall of 1932 nearly every acorn on this tree had a gall of 
Callirhytis balanaspis Weld, and the galls gathered on the ground 
in October produced adults that emerged on April 9, 19384. 
CALLIRHYTIS JUVENCA, new species 
Female—Biack; mandibles, knees, and ventral abdomen brown. 
Head from above transverse, vertex bare, shining, occiput pubescent, 
not concave; from in front broader than high, cheeks broadened behind 
the eyes, malar space coriaceous, 0.6 eye, frons shining, pubescent, an- 
tennae 13-segmented, lengths as (scape) 18:7:15:12:10:9:8:7:6:6: 
6:6:18. Pronotum pubescent. Mesoscutum with scattered fine setig- 
erous punctures on a microcoriaceous surface, parapsidal grooves 
narrow, obliterated anteriorly. Disk of scutellum rugose, pits sepa- 
rated byaseptum. Carinae of propodeum almost straight and parallel. 
Mesopleura largely bare, shining. Wing pubescent and ciliate, veins 
brown, first abscissa of radius heaviest, arcuate, areolet reaching one- 
eighth way to basal. Tarsal claws simple. Abdomen longer than head 
plus thorax, lengths of tergites along dorsal curvature as 20:6:4:4: 
3:1, exposed parts of ILI-VI1 finely punctate, II with pubescent 
patches on sides at base. Ventral spine slender, tapering, about 7 
times as long as broad in side view. With width of head used as a 
base, the length of mesonotum ratio is 1.2, antenna 2.4, wing 4.4, ovi- 
positor 5.0. Length 2.5-3.3mm. Average of 20 specimens 2.89 mm. 
Ty pes.—vU.S.N.M. No. 56389: Types and three paratypes. Paratypes 
in the Chicago and American Museums of Natural History, Museum 
of Comparative Zoology, Academy of Natural Sciences of Philadel- 
phia, and California Academy of Sciences. 
Host.—An undetermined oak. 
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. Cap- 
ron collected galls on an undetermined oak November 1, 1935. Four 
files 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 
gambelu at Williams, Ariz., on April 11, 1918. 
