Parasitization of the Oriental Moth (Cnidocampa Flavescens (Walk.)) by Chaetexorista Javana B. and B

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Abstract
During 1929 and 1930 the larvivorid (tachinid) fly Chaetexorista iavana B. and B. was successfully introduced from Japan into the United States as a parasite of the oriental moth (Cnidocampa flavescens (Walk.)). The oriental moth has a very restricted distribution in this country, occurring, so far as is known, only in the vicinity of Boston, Mass. Because of the restricted range of the host and the fact that attack by other parasites is practically negligible, it has been possible to follow the history of the parasite in its new environment more closely than is usually the case with an introduced species. This paper is a record of the proportion of host larvae parasitized from 1930 through 1942, with some observations regarding the factors responsible for fluctuations in percentage of parasitization.

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