NEW AMERICAN CYNIPIDS. FROM GALLS—WELD 11 
longer than head plus thorax, length to height to width as 35: 34: 27; 
lengths of tergites along dorsal curvature as 19:8:7:7:5:5, small 
pubescent areas on sides of II, a few hairs on VII, hind margin of 
II and exposed areas of rest beautifully and closely punctate. Ven- 
tral spine in side view 4 times as long as broad. With width of head 
used as a base, the length of mesonotum ratio is 1.3, antenna 1.6, wing 
3.2. Length 2.55-3.3 mm. Average of six specimens 2.86 mm. 
Andricus formosus (Bassett), which produces a somewhat similar 
gall on various eastern red oaks, differs in having 15-segmented an- 
tennae, the mesopleura more finely sculptured, a percurrent median 
groove, and a red abdomen with tergite II relatively longer. 
Types.—U.S.N.M. No. 56380: Type and one paratype. Paratypes 
in California Academy of Sciences and Chicago and American Mu- 
seums of Natural History. 
Gall (pl. 2, fig. 18) —Ovoid, 8 by 5 mm., whitish with a velvety 
surface when young, a button-shaped mass of pubescence at apex. 
Produced in clusters of 3-5 on the previous year’s growth early in 
spring, dropping to the ground early in July. A cross section of a 
mature gall shows a larval cavity in the center, 2 mm. in diameter, 
the thick surrounding wall cellular and traversed by 11-13 rather 
large canals. 
FHost.—Quercus emoryt. 
Habitat—The type material was collected at Wolf Creek Camp 
near Prescott, Ariz., July 18, 1935, by Mrs. N. W. Capron. Living 
adults were cut out of the galls on April 15, 1986. She also sent old 
galls from Young, Ariz., and clusters just starting to develop on 
February 4 from Nogales. The writer collected these galls at Oracle, 
Nogales, Patagonia, and in the Huachuca Mountains, Ariz. 
ANDRICUS NIGRIDIUS, new name 
Callirhytis nigra FuLLAWwAY, Ann. Ent. Soc. Amer., vol. 4, p. 362, 1911. 
Diplolepis operta WELD, Proc. U.S. Nat. Mus., vol. 68, art. 10, p. 29, 1926. 
Not Andricus luteicornis var. niger TAVARES, Broteria, vol. 1, p. 10, 1902. 
Not Andricus niger TAVARES, Broteria, ser. zool., vol. 14, No. 2, pp. 84-87, 1916. 
C. nigra was described as from a twig swelling on Quercus lobata 
and being thought to have simple claws was placed in Callirhytis. 
The unique type at Stanford University examined in 1935 has the 
claws toothed and was found to agree with paratypes of Diplolepis 
operta Weld, which came from galls inside the buds of Q. lobata. ‘The 
type gall at Stanford is a twig swelling, which also bears a large bud 
with an exit hole in the side, and the type fly evidently came from a 
gall inside the bud rather than from the twig swelling. As the name 
niger was preoccupied in Andricus by Tavares in 1902, the new name 
nigridius is here proposed for nigra Fullaway. 
