The reader of the Canadian Entomologist will recall the first paper on the Tortricidœ, by Professor Fernald, who has been kind enough to send me advance sheets of his Catalogue of the Family now being published in Philadelphia.

At the time when Professor Fernald commenced his studies he paid me the complinent of asking my advice as to the group of Lepidoptera he should work upon. In advising him to take the Tortricidœ, I was influenced by my belief in his patience and scientific ability. No family of Lepidoptera which I have studied, except perhaps the phycidœ, are as difficult as the Tortrices, or call for more diligent examination and careful manipulation. I had been bringing together material for a study of the Tortricidœ, and had described a few species and the genus Phaecasiophora, when Professor Fernald wrote to me. I was thus in a position to be of the slight assistance which Professor Fernald has, I am afraid, overestimated in his original paper alluded to above.