PSYCHE VOL. XX. OCTOBER, 1913. No. S THE GALL MIDGE FAUNA OF NEW ENGLAND. By E. P. Felt, Albany, N. Y. The following list of New England Diptera referable to the Itonididse has been made possible through the co-operation of a few individuals. Mr. C. W. Johnson and Mr. Owen Bryant have collected in various localities and generously placed their material at our disposal, while Miss Cora H. Clarke has been particularly successful in collecting galls and rearing the adults. The late Dr. M. T. Thompson made noteworthy additions to our knowledge of this group. In addition to the above we have referred to the list of insect galls prepared by Miss Stebbins. 1 This latter in-cludes a considerable number of common species which have also been recorded or observed by other workers. In view of the fact that nearly 900 species of gall midges are known to occur in America, it can hardly be claimed that the present list of 137 species exhausts the possibilities for New Eng-land, though it compares very favorably with the list of forms recorded by us from western North America, 2 a territory much larger and more diversified than that of New England. The sim-ilarities and differences in our knowledge concerning the fauna of these areas is well shown in the following tabulation. 1 1910, Stebbins, F. A. Springfield Mus. Nat. Hist. Bui. 2. 2 1912, Pomona College Journ. of Ent. 4:753-57.