4. PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
Habditat—Galls at Flagstaff, Ariz., contained adults on April 10 
and flies emerged May 11-23 (Hopk. U.S. 15626°). Galls from Pres- 
cott, Ariz., gave adults on same dates. Galls were seen at Grand 
Canyon and Williams, Ariz., and in New Mexico at Tijeras and Fierro 
and in Colorado at Colorado Springs. 
Genus TRICHOTERAS Ashmead 
TRICHOTERAS FRONDEUM, new species 
Female.—Brown with silvery pubescence, only the upper meso- 
pleura and most of abdomen bare. Head coriaceous, from above 
transverse, broader than thorax, cheeks broadened behind eyes, occi- 
put straight; from in front interocular area 1.28 times as broad as 
high, malar space 0.44 eye without groove, antenna 12-segmented, 
lengths as (scape) 15(5):7:14(4) :14:12:10:9:8:7:6:5:11(5.5), 
last six with rhinaria. Mesoscutum broader than long, coriaceous, 
parapsidal grooves percurrent, very distinct. Scutellum longer than 
broad, granulate, with two shining, smooth, shallow pits at base. 
Area between carinae on propodeum narrower above. Mesopleura 
largely shining, smooth, pubescent below. Wing reduced, just 
reaching the tip of abdomen, pubescent, ciliate, veins brown, areolet 
not formed, cubitus not reaching basal. Abdomen longer than head 
plus thorax, longer than high, lengths of the tongue-shaped tergites as 
20:6:5. Ventral spine in side view six times as long as broad, 
shorter than hind metatarsus. Claws with a strong tooth. With 
width of the head used as a base, the length of mesonotum ratio 
is 1.05, antenna 2.1, wing 2.2. Length 2.15-2.5 mm. Described from 
four specimens (one lacks head). 
Types —uU.S.N.M. No. 56373: Type. Paratype in California Acad- 
emy of Sciences. 
Host—Quercus chrysolepis. 
Gall (pl. 1, fig. 6) —A transformed lateral bud, the outer brown 
bud scales surrounding a mass of thinner, narrower bracts. At the 
base in the center is a single, ovoid, thin-walled cell, 3.0 by 1.7 mm. at 
whose base and apex is a circle and tuft of straight, single-celled, 
slender white hairs 1.5 mm. long. 
Habitat—The types (dead) were cut out of galls collected at Idyll. 
wild, Calif., on September 21, 1922. The characteristic galls have 
been seen on Mount Wilson, in the San Bernardino Mountains, in Se- 
quoia National Park, at Kyburz, Los Gatos, and Shasta in California, 
and at Canyonville, Oreg. A similar gall on Quercus wilcoxti was 
noted in the Santa Catalina, Chiricahua, and Huachuca Mountains 
in Arizona. 
