OF WASHI.N<;T<>.\, VOLUME xix, 191: 29 THREE HUNDREDTH MEETING, JANUARY 4, 1917 The 300th regular meeting of the Society was entertained by Mr. E. A. Schwarz at the Saengerbund Hall, January 4, 1917. There were present Messrs. Ainslie, Back, Baker, Boving, Busck, Caudell, Cole, Cushman, Dietz, Duckett, Ely, Fink, Gahan, Garman, Gibson, Gill, Greene, Heinrich, Howard, Hunter, Hutchison, Isely, Johansen, Kelly, Kotinsky, Marlatt, Mid-dleton, Morrison, Pierce, Popenoe, Ransom, Rohwer, Sanford, Sasscer, Schwarz, Simanton, Snyder, Turner, Walton, and White, members, and K. B. Brown, J. A. Corcoran, W. E. Dove, Henry Fox, Seymour Hiadwen, Leale F. Howard, H. G. Ingerson, U. C. Loftus, visitors. Mr. James C. Evenden, Bureau of Entomology was elected a corresponding member. Mr. J. S. Wade, of the Bureau of Entomology, and Mr. Harry F. Dietz, of the Federal Horticultural Board, were elected active members. The chair announced the death January 2, 1917, of Mr. John F. Strauss, a member of the Society. The following program was presented: A REVISION OF THE NORTH AMERICAN GRACILARIIDAE FROM THE STANDPOINT OF VENATION. BY C. R. ELY. The writer has for some time been interested in the genus drucilarid and its allies. The appearance of Meyrick's Revision of the Gracilariidae was therefore very welcome. It was a mat-ter of some surprise that, in this revision, the character of the vestiture of the legs was made of chief importance in delimiting genera and that less emphasis than usual was placed upon vena-i i"ii. It is not intended, in this paper, to combat the deliberate opinion of Mr. Meyrick, in regard to what character is of most importance within this family, but it is believed that the publi-cation of a classification of our North American forms, from the standpoint of venation, may be made to serve a useful purpose.