The only remedy known is to cut out and burn the diseased stems. Whether Bordeaux mixture or any other copper solution will protect the shrub from attack, is not known. So far as I know, it has not been tried. It is probable, however, that if the stems were thoroughly sprayed with the Bordeaux mixture they would be protected from attack. The mycelium of the fungus grows into the cambium and practically girdles the stems. The black pustules contain the spores. Very truly yours, ALBERT F. WOODS, _Acting Chief_. On the receipt of this note of Prof. Woods, I looked up Ellis and Everhart's work, a voluminous one of over 800 octavo pages, published by the authors at Newfield, N. J. This filbert blight is briefly described under the scientific name of _Cryptospora anomala_, Pk., but Prof. Peck writes me that "the description was made from specimens discovered near Albany, N. Y., in May, 1874. In 1882 this description was republished by Saccardo, in his "Syllage Fungorum," Vol. I, p. 470, under the name of _Cryptosporella anomala_. The original name in Report 28, p. 72, was _Diatrype anomala_. In 1892 Ellis and Everhart, in "Pyrenomycetes of North America," p. 531, changed the name again, making it _Cryptospora anomala_." So at present we have the names of this fungus in the following order: _Diatrypes anomal_, Peck, 1876. _Cryptosporella anomala_, Sacc., 1882. _Cryptospora anomala_, E. and E., 1892. Ellis and Everhart, after giving scientific description, add, "On living stems of _Corylus Americana_, Albany, N. Y. (Peck), Iowa (Holoway), on _Corylus Avellana_, Newfield, N. J. The pustules appear first on the smaller branches, and are serrately arranged along one side of the branch; afterwards they appear also on the larger branches and on the trunk itself, and in the course of two or three years the part of tree above ground is entirely killed. The roots, however, still retain their vitality, and continue to send up each year a luxuriant growth of new shoots, destined to be destroyed the succeeding year by the inexorable pest. The imported trees seem to be more injuriously affected than the native species." The observations of Ellis and Everhart and Prof. Woods accord with my own, but I may say that the infested branches often show the presence of the mycelium in the bark and alburnum,--by a slight shrinking,--weeks or months before the pustules appear, for these are merely indications of the last stage in the life of the fungus, and with the throwing off the spores from these pustules the old parasite perishes.