Abstract
The alternate, sexual generation of Callirhytis quercuscornigera (Osten Sacken), comb. rev. was found by experimental rearing and field observations. Descriptions of the adult, gall, biology, and host plants of the sexual generation are given. A new species of cynipid inquiline, Ceroptres cornigera Melika & Buss, reared from galls of the sexual and asexual generations of Callirhytis quercuscornigera (Osten Sacken) of the eastern United States is also described and illustrated. This is the first known species of Ceroptres to inhabit galls from alternating generations of its host cynipid. Descriptive data, diagnostic characters, distribution, and biological information are given.
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