The fruit industry, of course, in New York is quite large, both apples and cherries, so that there is a considerable problem there as far as control is concerned. The growers spend thousands of dollars every year in combatting the various species of fruit flies. The interesting thing in this connection is that throughout the last 25 years with which I am familiar with the cherry fruit flies--in fact, that was one of the first projects I worked on in cooperation with Dr. Hugh Glasgow when I came to the Experiment Station in 1925--the control measures which we developed in 1925 to 1927 are essentially the ones which we are still using today; that is, for the most part. There have been various attempts to change the control program through the introduction of these newer insecticides, and some progress has been made, but in every case they have been wrought with some difficulties. At the present time the official state recommendations for the control of apple maggot and cherry maggot still include the use of arsenate of lead under some conditions. I mention that at this point because it is of some significance in the overall control. I am going to discuss that later on. As far as the host plants and distribution of the walnut husk maggot is concerned, according to the original description which was published almost a hundred years ago, it was listed as occurring in and to the Middle States. That is a little bit indefinite, but at least it occurs all over the Eastern United States and as far west as Kansas. Then the one which occurs in California, which has since been called _Rhagoletis completus_ (?) looks very similar to the one that we have here, but there are slight taxonomic differences, so at least it is considered a different species. At any rate, it is very similar to the one we have here, and this whole group of fruit flies that we have been talking about have a lot of similarity in their wing patterns and things of that sort. And the fact that I mentioned the control as generally as I did is of significance in that all of these flies of the various species are apparently susceptible to the same type of control measure. As far as the host plants are concerned, I have personally observed injury on all of our common _Juglans_ species that I have run across in New York State and in some of the states to the south of us, including butternut, Japanese walnut, English walnut and black walnut. I have seen reports of infestations which were recorded in hickory, but I personally have not seen them.