18 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 95 
© 
long-ciliate. Length of 50 specimens 0.75-1.15 mm. Average 0.88 
mm. 
Types.—U.S.N.M. No. 56887: Type female, allotype, 13 male and 
13 female paratypes. Paratypes in the American and Chicago Mu- 
seums of Natural History, Museum of Comparative Zoology, Academy 
of Natural Sciences of Philadelphia, and California Academy of 
Sciences. 
Host.—Quercus tlicifolia. 
Gall (pl. 1, fig. 8; pl. 2, fig. 20).—Leaf parenchyma galls, not detach- 
able, not confluent, on several leaves derived from the same leaf bud 
and as many as 200 or 800 on a leaf. Individual galls are ellipsoidal, 
1.2 mm. high, projecting equally on upper and lower surfaces of the 
leaf, 0.8-0.9 mm. in diameter, bare above, pubescent below. Exit hole 
on upper surface. 
Habitat.—Type material was collected on July 5, 1930, and June 27, 
1933, at elevation of 2,000 feet on the trail to Signal Knob at north end 
of Three Top Mountain southeast of Strasburg, Va. Adults issued 
June 30-July 8. Galls were seen also 3 miles northwest of Vienna, Va. 
Prof. C. R. Crosby collected old galls at Riverhead, N. Y., in Sep- 
tember 1913. 
CALLIRHYTIS ELECTREA, new species 
Female.—Amber, only tips of mandibles and of antennae darker. 
Head from above transverse, occiput concave, cheeks broadened be- 
hind eyes; from in front broader than high, interocular area reticulate, 
malar space 0.3 eye, striate; antennae 14-seemented, lengths as (scape) 
15}(0)) § 38 WH) 3 IBYs ale Il 3 IG sIWOs OG) sSeSsoss sei), Ieeonoiwm, 
mesonotum, and propodeum reticulate. Parapsidal grooves more dis- 
tinct posteriorly, no median. Pits distinct, not quite smooth. Meso- 
pleura coriaceous above and below a few striae. Tarsal claws weak, 
simple. Wing pubescent and ciliate, veins brown, first abscissa of 
radius arcuate, areclet reaching one fifth way to basal. Abdomen 
shorter than head plus thorax, length to height to width as 27:27: 18, 
lengths of tergites along dorsal curvature as 63:21:17:14:7:6, ex- 
posed areas bare, smooth. Ventral spine in side view three times as 
long asbroad. With the width of the head used as a base, the length of 
mesonotum ratio is 1.18, antenna 2.1, wing 3.6, ovipositor 1.5. Length 
of 14 specimens 2.2-2.8 mm. Average 2.44 mm. Differs from all 
known species of this genus bred from galls of this sort in acorns by 
having the wings ciltate. 
Types —U.S.N.M. No. 56397: Type and two paratypes. Paratypes 
in the American and Chicago Museums of Natural History, Museum 
cf Comparative Zoology, and Academy of Natural Sciences of Phila- 
delphia. 
