Diplolepis amphora, new species
Host. — Quercus undulata.
Gall (fig. 31). — A hollow cylinder, sessile at base, swollen more or less in the middle and tapering to the apex which is contracted to a small hole leading into a deep cavity in the bottom of which and in the basal third of the gall is the thin-walled larval cell below which a small cavity leads to the pedicel. Red or brownish, 4-5 mm. high by 3 mm. in diameter, the hole at apex about 1 mm. in diameter. Occurs in fall and drops with the leaves, usually only one or two on a leaf near the edge on under side.
Habitat. — The type is selected from material collected on Q. undulata at Tijeras, N. Mex., November 1, 1921, when some of the galls contained pupae and others adults. Paratypes are from Q. undulata in Blue Canyon west and Nogal Canyon south of Socorro, the living flies cut out of the galls January 3, 1922. Other paratypes are from the same host at Hillsboro, the flies cut out November 16. Paratypes also are from Prescott, Ariz., (host not recorded), the galls collected April 13, 1918, the flies emerging before April 20 (Hopkins U. S. No. 15617/i;). The galls have been collected on Q. undulata at the "breaks " south of Bard, N. Mex., (E, E. Goddard), and at Ashfork, Ariz. The writer has collected what he takes to be galls of this species on Q. grisea at Magdalena, N. Mex.; on Q. arizonica at Bisbee and Oracle, Ariz. ; and on Q. oblongifolia at Nogales, Patagonia, and in Huachuca and Santa Catalina Mountains, Ariz.
