24. PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
terior and lateral lines obscure, no median. Scutellum longer than 
broad, disk rugose, with two distinct round pits at base. Carinae on 
propodeum arcuate. Mesopleura striate above with a polished area 
below. Tarsal claws weak, simple. Wing pubescent and ciliate, veins 
brown, first abscissa of radius arcuate, slightly clouded, areolet reach- 
ing one-ninth way to basal, cubitus reaching basal. Abdomen as high 
as long, all tergites visible dorsally, II longest, smooth and bare on 
sides at base, its hind margin oblique. Ventral spine three times as 
long as broad in side view. With the width of the head used as a 
base, the length of mesonotum ratio is 1.4; antenna 2.8; ovipositor 
1.6; wing 4.4. Length 1.3-2.1mm. Average of 20 specimens 1.95 mm. 
Male.—Similar to female in color; antenna filiform, 15-segmented, 
malar space one-seventh eye; abdomen small, with a distinct pedicel. 
Length 1.6-2.0mm. Average of four 1.8 mm. 
Types.—U.S.N.M. No. 56393: Type female, allotype, and four fe- 
male paratypes. Paratypes in the American and Chicago Museums 
of Natural History, Museum of Comparative Zoology, Academy 
of Natural Sciences of Philadelphia, and California Academy of 
Sciences. 
Gall (pl. 1, fig. 4) —Two-chambered, fleshy, reddish, 2.0 mm. in 
diameter, from bud on side of twigs in spring, single or usually in 
small clusters. The larva occupies the basal cavity. After the 
adults emerge the walls of the upper shrivel. 
Flost.— Quercus wislizenit. 
Habitat—The type series was reared from galls collected at Lake- 
port and Ukiah, Calif., on May 10 and 12, 1922, when the galls con- 
tained pupae. Adults issued a few days later and were found dead in 
the box on May 26. Galls were seen at Upper Lake and at Santa 
Rosa, Calif. Similar galls were seen on Q. agrifolia at Santa Anita, 
Santa Barbara, Newhall, Fillmore, and Ojai, Calif. 
U. S. GOVERNMENT PRINTING OFFICE; 1944 
