In the Canadian Entomologist, Vol XXVII. page 33 (1895), Professor T. D. A. Cockerell stated that Dr. James Fletcher and just sent him a species of Chionaspis from Charlottetown, Prince Elward Island — very abundant on the bark of Betula papyrifera – and that in comparing it with Prof. Costomck's description of C. Lintneri he believed it to be that species. Following the description of the Prince Edward Island specimens, Prof. Cockerell drew attention to a few probable points of difference between it and Prof. Comstock's description, but as he could find no positive differences he did not separate the form on Betula, inferring that the discrepancy was due either to variation in his specimens or the incompleteness of Prof. Comstock's description. I have since received specimens of the form on Betula papyrifera from Prof. Comstock and Dr. J. A. Lintner, and latter gentleman has also lent me Prof. Comstock's co-types of C. Lintneri. On comparing the two I was at aonce convinced that they were distinct, and upon giving Prof. Cockerell my reasons for thinking that the two insects could not be identical, he advised me to separate the form on Betula.