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Title: A New Species of Torymus (Hymenoptera: Torymidae) Parasitic on Pachypsylla Celtidis-Vesicula Riley (Chermidae) with Notes on its Biology and Other Parasitoids attacking the same host at Columbus, Ohio
Author(s): Moser, John C.
Date: 1956
Source: Journal of the Kanas Entomological Society 29(2): 57-62
Description: The genus Torymus is a group in which the vast majority of species are ectoparasitic on dipterous or hymenopterous gall makers. Three species, however, have been recorded from Homoptera, one on the eggs of Cicadidae and two others as gall parasitoids of the genus Pachypsylla which are gall makers of Celtis sp. (hackberry). Torymus pachypsyllac (Ashmead) is recorded, Ashmead (1888), from twig gals of Pachypsylla venusta (Osten Sacken). An additional host record is supplied by Lienk (1951), who reords it from the leaf gall maker. Another species, Torymus scalaris (Huber), is recorded from twig galls, Huber (1927), of Pachypsylla celtidis-gemma Riley.
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