Parasites of the Filbert Worm1

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Abstract
In the course of investigations of the filbert worm, Melissopus latijerreanus as a pest of filbert nuts in the Pacific Coast States, 19 of its insect parasites were discovered during the years 1937 to 1941 inclusive. The distribution, life history, and economic importance of most of the spp. is presented. 3 of these parasites belong to the Tachinidae while the remaining 16 spp. are distributed among the following 5 families of Hymenoptera: 5 Braconi-dae, 5 Ichneumonidae, 4 Bethylidae, 1 Eulophidae, and 1 Trichogrammidae. 5 of the spp. discussed are new to science, 2 of which were found to be among the most common and with a wide range of distribution. Bassus nuci-cola was reared from infested acorns and Andricus [center dot] galls collected in western Oregon and California. One specimen of Orgilus, n. sp. was reared from s.-w. Oregon and another from west central California. Lissonota inconstans, recovered in greater numbers than any of the other parasites, was reared from infested filberts, walnuts, acorns, and hazelnuts from- western Oregon and from acorns and Cata-lina cherry from California. Goniozus, n. sp. was recovered from infested material in western Oregon and Perisierola, n. sp. from Yakima County, Washington.

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